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env-llmeval/lib/python3.10/site-packages/pandas/tests/io/parser/common/test_chunksize.py

@@ -0,0 +1,378 @@
+"""
+Tests that work on both the Python and C engines but do not have a
+specific classification into the other test modules.
+"""
+from io import StringIO
+
+import numpy as np
+import pytest
+
+from pandas._libs import parsers as libparsers
+from pandas.errors import DtypeWarning
+
+from pandas import (
+    DataFrame,
+    concat,
+)
+import pandas._testing as tm
+
+pytestmark = pytest.mark.filterwarnings(
+    "ignore:Passing a BlockManager to DataFrame:DeprecationWarning"
+)
+
+
+@pytest.mark.parametrize("index_col", [0, "index"])
+def test_read_chunksize_with_index(all_parsers, index_col):
+    parser = all_parsers
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+
+    expected = DataFrame(
+        [
+            ["foo", 2, 3, 4, 5],
+            ["bar", 7, 8, 9, 10],
+            ["baz", 12, 13, 14, 15],
+            ["qux", 12, 13, 14, 15],
+            ["foo2", 12, 13, 14, 15],
+            ["bar2", 12, 13, 14, 15],
+        ],
+        columns=["index", "A", "B", "C", "D"],
+    )
+    expected = expected.set_index("index")
+
+    if parser.engine == "pyarrow":
+        msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            with parser.read_csv(StringIO(data), index_col=0, chunksize=2) as reader:
+                list(reader)
+        return
+
+    with parser.read_csv(StringIO(data), index_col=0, chunksize=2) as reader:
+        chunks = list(reader)
+    tm.assert_frame_equal(chunks[0], expected[:2])
+    tm.assert_frame_equal(chunks[1], expected[2:4])
+    tm.assert_frame_equal(chunks[2], expected[4:])
+
+
+@pytest.mark.parametrize("chunksize", [1.3, "foo", 0])
+def test_read_chunksize_bad(all_parsers, chunksize):
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+    parser = all_parsers
+    msg = r"'chunksize' must be an integer >=1"
+    if parser.engine == "pyarrow":
+        msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+
+    with pytest.raises(ValueError, match=msg):
+        with parser.read_csv(StringIO(data), chunksize=chunksize) as _:
+            pass
+
+
+@pytest.mark.parametrize("chunksize", [2, 8])
+def test_read_chunksize_and_nrows(all_parsers, chunksize):
+    # see gh-15755
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+    parser = all_parsers
+    kwargs = {"index_col": 0, "nrows": 5}
+
+    if parser.engine == "pyarrow":
+        msg = "The 'nrows' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), **kwargs)
+        return
+
+    expected = parser.read_csv(StringIO(data), **kwargs)
+    with parser.read_csv(StringIO(data), chunksize=chunksize, **kwargs) as reader:
+        tm.assert_frame_equal(concat(reader), expected)
+
+
+def test_read_chunksize_and_nrows_changing_size(all_parsers):
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+    parser = all_parsers
+    kwargs = {"index_col": 0, "nrows": 5}
+
+    if parser.engine == "pyarrow":
+        msg = "The 'nrows' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), **kwargs)
+        return
+
+    expected = parser.read_csv(StringIO(data), **kwargs)
+    with parser.read_csv(StringIO(data), chunksize=8, **kwargs) as reader:
+        tm.assert_frame_equal(reader.get_chunk(size=2), expected.iloc[:2])
+        tm.assert_frame_equal(reader.get_chunk(size=4), expected.iloc[2:5])
+
+        with pytest.raises(StopIteration, match=""):
+            reader.get_chunk(size=3)
+
+
+def test_get_chunk_passed_chunksize(all_parsers):
+    parser = all_parsers
+    data = """A,B,C
+1,2,3
+4,5,6
+7,8,9
+1,2,3"""
+
+    if parser.engine == "pyarrow":
+        msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            with parser.read_csv(StringIO(data), chunksize=2) as reader:
+                reader.get_chunk()
+        return
+
+    with parser.read_csv(StringIO(data), chunksize=2) as reader:
+        result = reader.get_chunk()
+
+    expected = DataFrame([[1, 2, 3], [4, 5, 6]], columns=["A", "B", "C"])
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize("kwargs", [{}, {"index_col": 0}])
+def test_read_chunksize_compat(all_parsers, kwargs):
+    # see gh-12185
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+    parser = all_parsers
+    result = parser.read_csv(StringIO(data), **kwargs)
+
+    if parser.engine == "pyarrow":
+        msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            with parser.read_csv(StringIO(data), chunksize=2, **kwargs) as reader:
+                concat(reader)
+        return
+
+    with parser.read_csv(StringIO(data), chunksize=2, **kwargs) as reader:
+        via_reader = concat(reader)
+    tm.assert_frame_equal(via_reader, result)
+
+
+def test_read_chunksize_jagged_names(all_parsers):
+    # see gh-23509
+    parser = all_parsers
+    data = "\n".join(["0"] * 7 + [",".join(["0"] * 10)])
+
+    expected = DataFrame([[0] + [np.nan] * 9] * 7 + [[0] * 10])
+
+    if parser.engine == "pyarrow":
+        msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            with parser.read_csv(
+                StringIO(data), names=range(10), chunksize=4
+            ) as reader:
+                concat(reader)
+        return
+
+    with parser.read_csv(StringIO(data), names=range(10), chunksize=4) as reader:
+        result = concat(reader)
+    tm.assert_frame_equal(result, expected)
+
+
+def test_chunk_begins_with_newline_whitespace(all_parsers):
+    # see gh-10022
+    parser = all_parsers
+    data = "\n hello\nworld\n"
+
+    result = parser.read_csv(StringIO(data), header=None)
+    expected = DataFrame([" hello", "world"])
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.slow
+def test_chunks_have_consistent_numerical_type(all_parsers, monkeypatch):
+    # mainly an issue with the C parser
+    heuristic = 2**3
+    parser = all_parsers
+    integers = [str(i) for i in range(heuristic - 1)]
+    data = "a\n" + "\n".join(integers + ["1.0", "2.0"] + integers)
+
+    # Coercions should work without warnings.
+    with monkeypatch.context() as m:
+        m.setattr(libparsers, "DEFAULT_BUFFER_HEURISTIC", heuristic)
+        result = parser.read_csv(StringIO(data))
+
+    assert type(result.a[0]) is np.float64
+    assert result.a.dtype == float
+
+
+def test_warn_if_chunks_have_mismatched_type(all_parsers):
+    warning_type = None
+    parser = all_parsers
+    size = 10000
+
+    # see gh-3866: if chunks are different types and can't
+    # be coerced using numerical types, then issue warning.
+    if parser.engine == "c" and parser.low_memory:
+        warning_type = DtypeWarning
+        # Use larger size to hit warning path
+        size = 499999
+
+    integers = [str(i) for i in range(size)]
+    data = "a\n" + "\n".join(integers + ["a", "b"] + integers)
+
+    buf = StringIO(data)
+
+    if parser.engine == "pyarrow":
+        df = parser.read_csv(
+            buf,
+        )
+    else:
+        df = parser.read_csv_check_warnings(
+            warning_type,
+            r"Columns \(0\) have mixed types. "
+            "Specify dtype option on import or set low_memory=False.",
+            buf,
+        )
+
+    assert df.a.dtype == object
+
+
+@pytest.mark.parametrize("iterator", [True, False])
+def test_empty_with_nrows_chunksize(all_parsers, iterator):
+    # see gh-9535
+    parser = all_parsers
+    expected = DataFrame(columns=["foo", "bar"])
+
+    nrows = 10
+    data = StringIO("foo,bar\n")
+
+    if parser.engine == "pyarrow":
+        msg = (
+            "The '(nrows|chunksize)' option is not supported with the 'pyarrow' engine"
+        )
+        with pytest.raises(ValueError, match=msg):
+            if iterator:
+                with parser.read_csv(data, chunksize=nrows) as reader:
+                    next(iter(reader))
+            else:
+                parser.read_csv(data, nrows=nrows)
+        return
+
+    if iterator:
+        with parser.read_csv(data, chunksize=nrows) as reader:
+            result = next(iter(reader))
+    else:
+        result = parser.read_csv(data, nrows=nrows)
+
+    tm.assert_frame_equal(result, expected)
+
+
+def test_read_csv_memory_growth_chunksize(all_parsers):
+    # see gh-24805
+    #
+    # Let's just make sure that we don't crash
+    # as we iteratively process all chunks.
+    parser = all_parsers
+
+    with tm.ensure_clean() as path:
+        with open(path, "w", encoding="utf-8") as f:
+            for i in range(1000):
+                f.write(str(i) + "\n")
+
+        if parser.engine == "pyarrow":
+            msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+            with pytest.raises(ValueError, match=msg):
+                with parser.read_csv(path, chunksize=20) as result:
+                    for _ in result:
+                        pass
+            return
+
+        with parser.read_csv(path, chunksize=20) as result:
+            for _ in result:
+                pass
+
+
+def test_chunksize_with_usecols_second_block_shorter(all_parsers):
+    # GH#21211
+    parser = all_parsers
+    data = """1,2,3,4
+5,6,7,8
+9,10,11
+"""
+
+    if parser.engine == "pyarrow":
+        msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(
+                StringIO(data),
+                names=["a", "b"],
+                chunksize=2,
+                usecols=[0, 1],
+                header=None,
+            )
+        return
+
+    result_chunks = parser.read_csv(
+        StringIO(data),
+        names=["a", "b"],
+        chunksize=2,
+        usecols=[0, 1],
+        header=None,
+    )
+
+    expected_frames = [
+        DataFrame({"a": [1, 5], "b": [2, 6]}),
+        DataFrame({"a": [9], "b": [10]}, index=[2]),
+    ]
+
+    for i, result in enumerate(result_chunks):
+        tm.assert_frame_equal(result, expected_frames[i])
+
+
+def test_chunksize_second_block_shorter(all_parsers):
+    # GH#21211
+    parser = all_parsers
+    data = """a,b,c,d
+1,2,3,4
+5,6,7,8
+9,10,11
+"""
+
+    if parser.engine == "pyarrow":
+        msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), chunksize=2)
+        return
+
+    result_chunks = parser.read_csv(StringIO(data), chunksize=2)
+
+    expected_frames = [
+        DataFrame({"a": [1, 5], "b": [2, 6], "c": [3, 7], "d": [4, 8]}),
+        DataFrame({"a": [9], "b": [10], "c": [11], "d": [np.nan]}, index=[2]),
+    ]
+
+    for i, result in enumerate(result_chunks):
+        tm.assert_frame_equal(result, expected_frames[i])

env-llmeval/lib/python3.10/site-packages/pandas/tests/io/parser/common/test_common_basic.py

@@ -0,0 +1,979 @@
+"""
+Tests that work on both the Python and C engines but do not have a
+specific classification into the other test modules.
+"""
+from datetime import datetime
+from inspect import signature
+from io import StringIO
+import os
+from pathlib import Path
+import sys
+
+import numpy as np
+import pytest
+
+from pandas.errors import (
+    EmptyDataError,
+    ParserError,
+    ParserWarning,
+)
+
+from pandas import (
+    DataFrame,
+    Index,
+    Timestamp,
+    compat,
+)
+import pandas._testing as tm
+
+from pandas.io.parsers import TextFileReader
+from pandas.io.parsers.c_parser_wrapper import CParserWrapper
+
+pytestmark = pytest.mark.filterwarnings(
+    "ignore:Passing a BlockManager to DataFrame:DeprecationWarning"
+)
+
+xfail_pyarrow = pytest.mark.usefixtures("pyarrow_xfail")
+skip_pyarrow = pytest.mark.usefixtures("pyarrow_skip")
+
+
+def test_override_set_noconvert_columns():
+    # see gh-17351
+    #
+    # Usecols needs to be sorted in _set_noconvert_columns based
+    # on the test_usecols_with_parse_dates test from test_usecols.py
+    class MyTextFileReader(TextFileReader):
+        def __init__(self) -> None:
+            self._currow = 0
+            self.squeeze = False
+
+    class MyCParserWrapper(CParserWrapper):
+        def _set_noconvert_columns(self):
+            if self.usecols_dtype == "integer":
+                # self.usecols is a set, which is documented as unordered
+                # but in practice, a CPython set of integers is sorted.
+                # In other implementations this assumption does not hold.
+                # The following code simulates a different order, which
+                # before GH 17351 would cause the wrong columns to be
+                # converted via the parse_dates parameter
+                self.usecols = list(self.usecols)
+                self.usecols.reverse()
+            return CParserWrapper._set_noconvert_columns(self)
+
+    data = """a,b,c,d,e
+0,1,2014-01-01,09:00,4
+0,1,2014-01-02,10:00,4"""
+
+    parse_dates = [[1, 2]]
+    cols = {
+        "a": [0, 0],
+        "c_d": [Timestamp("2014-01-01 09:00:00"), Timestamp("2014-01-02 10:00:00")],
+    }
+    expected = DataFrame(cols, columns=["c_d", "a"])
+
+    parser = MyTextFileReader()
+    parser.options = {
+        "usecols": [0, 2, 3],
+        "parse_dates": parse_dates,
+        "delimiter": ",",
+    }
+    parser.engine = "c"
+    parser._engine = MyCParserWrapper(StringIO(data), **parser.options)
+
+    result = parser.read()
+    tm.assert_frame_equal(result, expected)
+
+
+def test_read_csv_local(all_parsers, csv1):
+    prefix = "file:///" if compat.is_platform_windows() else "file://"
+    parser = all_parsers
+
+    fname = prefix + str(os.path.abspath(csv1))
+    result = parser.read_csv(fname, index_col=0, parse_dates=True)
+    # TODO: make unit check more specific
+    if parser.engine == "pyarrow":
+        result.index = result.index.as_unit("ns")
+    expected = DataFrame(
+        [
+            [0.980269, 3.685731, -0.364216805298, -1.159738],
+            [1.047916, -0.041232, -0.16181208307, 0.212549],
+            [0.498581, 0.731168, -0.537677223318, 1.346270],
+            [1.120202, 1.567621, 0.00364077397681, 0.675253],
+            [-0.487094, 0.571455, -1.6116394093, 0.103469],
+            [0.836649, 0.246462, 0.588542635376, 1.062782],
+            [-0.157161, 1.340307, 1.1957779562, -1.097007],
+        ],
+        columns=["A", "B", "C", "D"],
+        index=Index(
+            [
+                datetime(2000, 1, 3),
+                datetime(2000, 1, 4),
+                datetime(2000, 1, 5),
+                datetime(2000, 1, 6),
+                datetime(2000, 1, 7),
+                datetime(2000, 1, 10),
+                datetime(2000, 1, 11),
+            ],
+            name="index",
+        ),
+    )
+    tm.assert_frame_equal(result, expected)
+
+
+def test_1000_sep(all_parsers):
+    parser = all_parsers
+    data = """A|B|C
+1|2,334|5
+10|13|10.
+"""
+    expected = DataFrame({"A": [1, 10], "B": [2334, 13], "C": [5, 10.0]})
+
+    if parser.engine == "pyarrow":
+        msg = "The 'thousands' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), sep="|", thousands=",")
+        return
+
+    result = parser.read_csv(StringIO(data), sep="|", thousands=",")
+    tm.assert_frame_equal(result, expected)
+
+
+@xfail_pyarrow  # ValueError: Found non-unique column index
+def test_unnamed_columns(all_parsers):
+    data = """A,B,C,,
+1,2,3,4,5
+6,7,8,9,10
+11,12,13,14,15
+"""
+    parser = all_parsers
+    expected = DataFrame(
+        [[1, 2, 3, 4, 5], [6, 7, 8, 9, 10], [11, 12, 13, 14, 15]],
+        dtype=np.int64,
+        columns=["A", "B", "C", "Unnamed: 3", "Unnamed: 4"],
+    )
+    result = parser.read_csv(StringIO(data))
+    tm.assert_frame_equal(result, expected)
+
+
+def test_csv_mixed_type(all_parsers):
+    data = """A,B,C
+a,1,2
+b,3,4
+c,4,5
+"""
+    parser = all_parsers
+    expected = DataFrame({"A": ["a", "b", "c"], "B": [1, 3, 4], "C": [2, 4, 5]})
+    result = parser.read_csv(StringIO(data))
+    tm.assert_frame_equal(result, expected)
+
+
+def test_read_csv_low_memory_no_rows_with_index(all_parsers):
+    # see gh-21141
+    parser = all_parsers
+
+    if not parser.low_memory:
+        pytest.skip("This is a low-memory specific test")
+
+    data = """A,B,C
+1,1,1,2
+2,2,3,4
+3,3,4,5
+"""
+
+    if parser.engine == "pyarrow":
+        msg = "The 'nrows' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), low_memory=True, index_col=0, nrows=0)
+        return
+
+    result = parser.read_csv(StringIO(data), low_memory=True, index_col=0, nrows=0)
+    expected = DataFrame(columns=["A", "B", "C"])
+    tm.assert_frame_equal(result, expected)
+
+
+def test_read_csv_dataframe(all_parsers, csv1):
+    parser = all_parsers
+    result = parser.read_csv(csv1, index_col=0, parse_dates=True)
+    # TODO: make unit check more specific
+    if parser.engine == "pyarrow":
+        result.index = result.index.as_unit("ns")
+    expected = DataFrame(
+        [
+            [0.980269, 3.685731, -0.364216805298, -1.159738],
+            [1.047916, -0.041232, -0.16181208307, 0.212549],
+            [0.498581, 0.731168, -0.537677223318, 1.346270],
+            [1.120202, 1.567621, 0.00364077397681, 0.675253],
+            [-0.487094, 0.571455, -1.6116394093, 0.103469],
+            [0.836649, 0.246462, 0.588542635376, 1.062782],
+            [-0.157161, 1.340307, 1.1957779562, -1.097007],
+        ],
+        columns=["A", "B", "C", "D"],
+        index=Index(
+            [
+                datetime(2000, 1, 3),
+                datetime(2000, 1, 4),
+                datetime(2000, 1, 5),
+                datetime(2000, 1, 6),
+                datetime(2000, 1, 7),
+                datetime(2000, 1, 10),
+                datetime(2000, 1, 11),
+            ],
+            name="index",
+        ),
+    )
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize("nrows", [3, 3.0])
+def test_read_nrows(all_parsers, nrows):
+    # see gh-10476
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+    expected = DataFrame(
+        [["foo", 2, 3, 4, 5], ["bar", 7, 8, 9, 10], ["baz", 12, 13, 14, 15]],
+        columns=["index", "A", "B", "C", "D"],
+    )
+    parser = all_parsers
+
+    if parser.engine == "pyarrow":
+        msg = "The 'nrows' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), nrows=nrows)
+        return
+
+    result = parser.read_csv(StringIO(data), nrows=nrows)
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize("nrows", [1.2, "foo", -1])
+def test_read_nrows_bad(all_parsers, nrows):
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+    msg = r"'nrows' must be an integer >=0"
+    parser = all_parsers
+    if parser.engine == "pyarrow":
+        msg = "The 'nrows' option is not supported with the 'pyarrow' engine"
+
+    with pytest.raises(ValueError, match=msg):
+        parser.read_csv(StringIO(data), nrows=nrows)
+
+
+def test_nrows_skipfooter_errors(all_parsers):
+    msg = "'skipfooter' not supported with 'nrows'"
+    data = "a\n1\n2\n3\n4\n5\n6"
+    parser = all_parsers
+
+    with pytest.raises(ValueError, match=msg):
+        parser.read_csv(StringIO(data), skipfooter=1, nrows=5)
+
+
+@skip_pyarrow
+def test_missing_trailing_delimiters(all_parsers):
+    parser = all_parsers
+    data = """A,B,C,D
+1,2,3,4
+1,3,3,
+1,4,5"""
+
+    result = parser.read_csv(StringIO(data))
+    expected = DataFrame(
+        [[1, 2, 3, 4], [1, 3, 3, np.nan], [1, 4, 5, np.nan]],
+        columns=["A", "B", "C", "D"],
+    )
+    tm.assert_frame_equal(result, expected)
+
+
+def test_skip_initial_space(all_parsers):
+    data = (
+        '"09-Apr-2012", "01:10:18.300", 2456026.548822908, 12849, '
+        "1.00361,  1.12551, 330.65659, 0355626618.16711,  73.48821, "
+        "314.11625,  1917.09447,   179.71425,  80.000, 240.000, -350,  "
+        "70.06056, 344.98370, 1,   1, -0.689265, -0.692787,  "
+        "0.212036,    14.7674,   41.605,   -9999.0,   -9999.0,   "
+        "-9999.0,   -9999.0,   -9999.0,  -9999.0, 000, 012, 128"
+    )
+    parser = all_parsers
+
+    if parser.engine == "pyarrow":
+        msg = "The 'skipinitialspace' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(
+                StringIO(data),
+                names=list(range(33)),
+                header=None,
+                na_values=["-9999.0"],
+                skipinitialspace=True,
+            )
+        return
+
+    result = parser.read_csv(
+        StringIO(data),
+        names=list(range(33)),
+        header=None,
+        na_values=["-9999.0"],
+        skipinitialspace=True,
+    )
+    expected = DataFrame(
+        [
+            [
+                "09-Apr-2012",
+                "01:10:18.300",
+                2456026.548822908,
+                12849,
+                1.00361,
+                1.12551,
+                330.65659,
+                355626618.16711,
+                73.48821,
+                314.11625,
+                1917.09447,
+                179.71425,
+                80.0,
+                240.0,
+                -350,
+                70.06056,
+                344.9837,
+                1,
+                1,
+                -0.689265,
+                -0.692787,
+                0.212036,
+                14.7674,
+                41.605,
+                np.nan,
+                np.nan,
+                np.nan,
+                np.nan,
+                np.nan,
+                np.nan,
+                0,
+                12,
+                128,
+            ]
+        ]
+    )
+    tm.assert_frame_equal(result, expected)
+
+
+@skip_pyarrow
+def test_trailing_delimiters(all_parsers):
+    # see gh-2442
+    data = """A,B,C
+1,2,3,
+4,5,6,
+7,8,9,"""
+    parser = all_parsers
+    result = parser.read_csv(StringIO(data), index_col=False)
+
+    expected = DataFrame({"A": [1, 4, 7], "B": [2, 5, 8], "C": [3, 6, 9]})
+    tm.assert_frame_equal(result, expected)
+
+
+def test_escapechar(all_parsers):
+    # https://stackoverflow.com/questions/13824840/feature-request-for-
+    # pandas-read-csv
+    data = '''SEARCH_TERM,ACTUAL_URL
+"bra tv board","http://www.ikea.com/se/sv/catalog/categories/departments/living_room/10475/?se%7cps%7cnonbranded%7cvardagsrum%7cgoogle%7ctv_bord"
+"tv p\xc3\xa5 hjul","http://www.ikea.com/se/sv/catalog/categories/departments/living_room/10475/?se%7cps%7cnonbranded%7cvardagsrum%7cgoogle%7ctv_bord"
+"SLAGBORD, \\"Bergslagen\\", IKEA:s 1700-tals series","http://www.ikea.com/se/sv/catalog/categories/departments/living_room/10475/?se%7cps%7cnonbranded%7cvardagsrum%7cgoogle%7ctv_bord"'''
+
+    parser = all_parsers
+    result = parser.read_csv(
+        StringIO(data), escapechar="\\", quotechar='"', encoding="utf-8"
+    )
+
+    assert result["SEARCH_TERM"][2] == 'SLAGBORD, "Bergslagen", IKEA:s 1700-tals series'
+
+    tm.assert_index_equal(result.columns, Index(["SEARCH_TERM", "ACTUAL_URL"]))
+
+
+def test_ignore_leading_whitespace(all_parsers):
+    # see gh-3374, gh-6607
+    parser = all_parsers
+    data = " a b c\n 1 2 3\n 4 5 6\n 7 8 9"
+
+    if parser.engine == "pyarrow":
+        msg = "the 'pyarrow' engine does not support regex separators"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), sep=r"\s+")
+        return
+    result = parser.read_csv(StringIO(data), sep=r"\s+")
+
+    expected = DataFrame({"a": [1, 4, 7], "b": [2, 5, 8], "c": [3, 6, 9]})
+    tm.assert_frame_equal(result, expected)
+
+
+@skip_pyarrow
+@pytest.mark.parametrize("usecols", [None, [0, 1], ["a", "b"]])
+def test_uneven_lines_with_usecols(all_parsers, usecols):
+    # see gh-12203
+    parser = all_parsers
+    data = r"""a,b,c
+0,1,2
+3,4,5,6,7
+8,9,10"""
+
+    if usecols is None:
+        # Make sure that an error is still raised
+        # when the "usecols" parameter is not provided.
+        msg = r"Expected \d+ fields in line \d+, saw \d+"
+        with pytest.raises(ParserError, match=msg):
+            parser.read_csv(StringIO(data))
+    else:
+        expected = DataFrame({"a": [0, 3, 8], "b": [1, 4, 9]})
+
+        result = parser.read_csv(StringIO(data), usecols=usecols)
+        tm.assert_frame_equal(result, expected)
+
+
+@skip_pyarrow
+@pytest.mark.parametrize(
+    "data,kwargs,expected",
+    [
+        # First, check to see that the response of parser when faced with no
+        # provided columns raises the correct error, with or without usecols.
+        ("", {}, None),
+        ("", {"usecols": ["X"]}, None),
+        (
+            ",,",
+            {"names": ["Dummy", "X", "Dummy_2"], "usecols": ["X"]},
+            DataFrame(columns=["X"], index=[0], dtype=np.float64),
+        ),
+        (
+            "",
+            {"names": ["Dummy", "X", "Dummy_2"], "usecols": ["X"]},
+            DataFrame(columns=["X"]),
+        ),
+    ],
+)
+def test_read_empty_with_usecols(all_parsers, data, kwargs, expected):
+    # see gh-12493
+    parser = all_parsers
+
+    if expected is None:
+        msg = "No columns to parse from file"
+        with pytest.raises(EmptyDataError, match=msg):
+            parser.read_csv(StringIO(data), **kwargs)
+    else:
+        result = parser.read_csv(StringIO(data), **kwargs)
+        tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize(
+    "kwargs,expected",
+    [
+        # gh-8661, gh-8679: this should ignore six lines, including
+        # lines with trailing whitespace and blank lines.
+        (
+            {
+                "header": None,
+                "delim_whitespace": True,
+                "skiprows": [0, 1, 2, 3, 5, 6],
+                "skip_blank_lines": True,
+            },
+            DataFrame([[1.0, 2.0, 4.0], [5.1, np.nan, 10.0]]),
+        ),
+        # gh-8983: test skipping set of rows after a row with trailing spaces.
+        (
+            {
+                "delim_whitespace": True,
+                "skiprows": [1, 2, 3, 5, 6],
+                "skip_blank_lines": True,
+            },
+            DataFrame({"A": [1.0, 5.1], "B": [2.0, np.nan], "C": [4.0, 10]}),
+        ),
+    ],
+)
+def test_trailing_spaces(all_parsers, kwargs, expected):
+    data = "A B C  \nrandom line with trailing spaces    \nskip\n1,2,3\n1,2.,4.\nrandom line with trailing tabs\t\t\t\n   \n5.1,NaN,10.0\n"  # noqa: E501
+    parser = all_parsers
+
+    depr_msg = "The 'delim_whitespace' keyword in pd.read_csv is deprecated"
+
+    if parser.engine == "pyarrow":
+        msg = "The 'delim_whitespace' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            with tm.assert_produces_warning(
+                FutureWarning, match=depr_msg, check_stacklevel=False
+            ):
+                parser.read_csv(StringIO(data.replace(",", "  ")), **kwargs)
+        return
+
+    with tm.assert_produces_warning(
+        FutureWarning, match=depr_msg, check_stacklevel=False
+    ):
+        result = parser.read_csv(StringIO(data.replace(",", "  ")), **kwargs)
+    tm.assert_frame_equal(result, expected)
+
+
+def test_raise_on_sep_with_delim_whitespace(all_parsers):
+    # see gh-6607
+    data = "a b c\n1 2 3"
+    parser = all_parsers
+
+    depr_msg = "The 'delim_whitespace' keyword in pd.read_csv is deprecated"
+    with pytest.raises(ValueError, match="you can only specify one"):
+        with tm.assert_produces_warning(
+            FutureWarning, match=depr_msg, check_stacklevel=False
+        ):
+            parser.read_csv(StringIO(data), sep=r"\s", delim_whitespace=True)
+
+
+def test_read_filepath_or_buffer(all_parsers):
+    # see gh-43366
+    parser = all_parsers
+
+    with pytest.raises(TypeError, match="Expected file path name or file-like"):
+        parser.read_csv(filepath_or_buffer=b"input")
+
+
+@pytest.mark.parametrize("delim_whitespace", [True, False])
+def test_single_char_leading_whitespace(all_parsers, delim_whitespace):
+    # see gh-9710
+    parser = all_parsers
+    data = """\
+MyColumn
+a
+b
+a
+b\n"""
+
+    expected = DataFrame({"MyColumn": list("abab")})
+    depr_msg = "The 'delim_whitespace' keyword in pd.read_csv is deprecated"
+
+    if parser.engine == "pyarrow":
+        msg = "The 'skipinitialspace' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            with tm.assert_produces_warning(
+                FutureWarning, match=depr_msg, check_stacklevel=False
+            ):
+                parser.read_csv(
+                    StringIO(data),
+                    skipinitialspace=True,
+                    delim_whitespace=delim_whitespace,
+                )
+        return
+
+    with tm.assert_produces_warning(
+        FutureWarning, match=depr_msg, check_stacklevel=False
+    ):
+        result = parser.read_csv(
+            StringIO(data), skipinitialspace=True, delim_whitespace=delim_whitespace
+        )
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize(
+    "sep,skip_blank_lines,exp_data",
+    [
+        (",", True, [[1.0, 2.0, 4.0], [5.0, np.nan, 10.0], [-70.0, 0.4, 1.0]]),
+        (r"\s+", True, [[1.0, 2.0, 4.0], [5.0, np.nan, 10.0], [-70.0, 0.4, 1.0]]),
+        (
+            ",",
+            False,
+            [
+                [1.0, 2.0, 4.0],
+                [np.nan, np.nan, np.nan],
+                [np.nan, np.nan, np.nan],
+                [5.0, np.nan, 10.0],
+                [np.nan, np.nan, np.nan],
+                [-70.0, 0.4, 1.0],
+            ],
+        ),
+    ],
+)
+def test_empty_lines(all_parsers, sep, skip_blank_lines, exp_data, request):
+    parser = all_parsers
+    data = """\
+A,B,C
+1,2.,4.
+
+
+5.,NaN,10.0
+
+-70,.4,1
+"""
+
+    if sep == r"\s+":
+        data = data.replace(",", "  ")
+
+        if parser.engine == "pyarrow":
+            msg = "the 'pyarrow' engine does not support regex separators"
+            with pytest.raises(ValueError, match=msg):
+                parser.read_csv(
+                    StringIO(data), sep=sep, skip_blank_lines=skip_blank_lines
+                )
+            return
+
+    result = parser.read_csv(StringIO(data), sep=sep, skip_blank_lines=skip_blank_lines)
+    expected = DataFrame(exp_data, columns=["A", "B", "C"])
+    tm.assert_frame_equal(result, expected)
+
+
+@skip_pyarrow
+def test_whitespace_lines(all_parsers):
+    parser = all_parsers
+    data = """
+
+\t  \t\t
+\t
+A,B,C
+\t    1,2.,4.
+5.,NaN,10.0
+"""
+    expected = DataFrame([[1, 2.0, 4.0], [5.0, np.nan, 10.0]], columns=["A", "B", "C"])
+    result = parser.read_csv(StringIO(data))
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize(
+    "data,expected",
+    [
+        (
+            """   A   B   C   D
+a   1   2   3   4
+b   1   2   3   4
+c   1   2   3   4
+""",
+            DataFrame(
+                [[1, 2, 3, 4], [1, 2, 3, 4], [1, 2, 3, 4]],
+                columns=["A", "B", "C", "D"],
+                index=["a", "b", "c"],
+            ),
+        ),
+        (
+            "    a b c\n1 2 3 \n4 5  6\n 7 8 9",
+            DataFrame([[1, 2, 3], [4, 5, 6], [7, 8, 9]], columns=["a", "b", "c"]),
+        ),
+    ],
+)
+def test_whitespace_regex_separator(all_parsers, data, expected):
+    # see gh-6607
+    parser = all_parsers
+    if parser.engine == "pyarrow":
+        msg = "the 'pyarrow' engine does not support regex separators"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), sep=r"\s+")
+        return
+
+    result = parser.read_csv(StringIO(data), sep=r"\s+")
+    tm.assert_frame_equal(result, expected)
+
+
+def test_sub_character(all_parsers, csv_dir_path):
+    # see gh-16893
+    filename = os.path.join(csv_dir_path, "sub_char.csv")
+    expected = DataFrame([[1, 2, 3]], columns=["a", "\x1ab", "c"])
+
+    parser = all_parsers
+    result = parser.read_csv(filename)
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize("filename", ["sé-es-vé.csv", "ru-sй.csv", "中文文件名.csv"])
+def test_filename_with_special_chars(all_parsers, filename):
+    # see gh-15086.
+    parser = all_parsers
+    df = DataFrame({"a": [1, 2, 3]})
+
+    with tm.ensure_clean(filename) as path:
+        df.to_csv(path, index=False)
+
+        result = parser.read_csv(path)
+        tm.assert_frame_equal(result, df)
+
+
+def test_read_table_same_signature_as_read_csv(all_parsers):
+    # GH-34976
+    parser = all_parsers
+
+    table_sign = signature(parser.read_table)
+    csv_sign = signature(parser.read_csv)
+
+    assert table_sign.parameters.keys() == csv_sign.parameters.keys()
+    assert table_sign.return_annotation == csv_sign.return_annotation
+
+    for key, csv_param in csv_sign.parameters.items():
+        table_param = table_sign.parameters[key]
+        if key == "sep":
+            assert csv_param.default == ","
+            assert table_param.default == "\t"
+            assert table_param.annotation == csv_param.annotation
+            assert table_param.kind == csv_param.kind
+            continue
+
+        assert table_param == csv_param
+
+
+def test_read_table_equivalency_to_read_csv(all_parsers):
+    # see gh-21948
+    # As of 0.25.0, read_table is undeprecated
+    parser = all_parsers
+    data = "a\tb\n1\t2\n3\t4"
+    expected = parser.read_csv(StringIO(data), sep="\t")
+    result = parser.read_table(StringIO(data))
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize("read_func", ["read_csv", "read_table"])
+def test_read_csv_and_table_sys_setprofile(all_parsers, read_func):
+    # GH#41069
+    parser = all_parsers
+    data = "a b\n0 1"
+
+    sys.setprofile(lambda *a, **k: None)
+    result = getattr(parser, read_func)(StringIO(data))
+    sys.setprofile(None)
+
+    expected = DataFrame({"a b": ["0 1"]})
+    tm.assert_frame_equal(result, expected)
+
+
+@skip_pyarrow
+def test_first_row_bom(all_parsers):
+    # see gh-26545
+    parser = all_parsers
+    data = '''\ufeff"Head1"\t"Head2"\t"Head3"'''
+
+    result = parser.read_csv(StringIO(data), delimiter="\t")
+    expected = DataFrame(columns=["Head1", "Head2", "Head3"])
+    tm.assert_frame_equal(result, expected)
+
+
+@skip_pyarrow
+def test_first_row_bom_unquoted(all_parsers):
+    # see gh-36343
+    parser = all_parsers
+    data = """\ufeffHead1\tHead2\tHead3"""
+
+    result = parser.read_csv(StringIO(data), delimiter="\t")
+    expected = DataFrame(columns=["Head1", "Head2", "Head3"])
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize("nrows", range(1, 6))
+def test_blank_lines_between_header_and_data_rows(all_parsers, nrows):
+    # GH 28071
+    ref = DataFrame(
+        [[np.nan, np.nan], [np.nan, np.nan], [1, 2], [np.nan, np.nan], [3, 4]],
+        columns=list("ab"),
+    )
+    csv = "\nheader\n\na,b\n\n\n1,2\n\n3,4"
+    parser = all_parsers
+
+    if parser.engine == "pyarrow":
+        msg = "The 'nrows' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(
+                StringIO(csv), header=3, nrows=nrows, skip_blank_lines=False
+            )
+        return
+
+    df = parser.read_csv(StringIO(csv), header=3, nrows=nrows, skip_blank_lines=False)
+    tm.assert_frame_equal(df, ref[:nrows])
+
+
+@skip_pyarrow
+def test_no_header_two_extra_columns(all_parsers):
+    # GH 26218
+    column_names = ["one", "two", "three"]
+    ref = DataFrame([["foo", "bar", "baz"]], columns=column_names)
+    stream = StringIO("foo,bar,baz,bam,blah")
+    parser = all_parsers
+    df = parser.read_csv_check_warnings(
+        ParserWarning,
+        "Length of header or names does not match length of data. "
+        "This leads to a loss of data with index_col=False.",
+        stream,
+        header=None,
+        names=column_names,
+        index_col=False,
+    )
+    tm.assert_frame_equal(df, ref)
+
+
+def test_read_csv_names_not_accepting_sets(all_parsers):
+    # GH 34946
+    data = """\
+    1,2,3
+    4,5,6\n"""
+    parser = all_parsers
+    with pytest.raises(ValueError, match="Names should be an ordered collection."):
+        parser.read_csv(StringIO(data), names=set("QAZ"))
+
+
+def test_read_table_delim_whitespace_default_sep(all_parsers):
+    # GH: 35958
+    f = StringIO("a  b  c\n1 -2 -3\n4  5   6")
+    parser = all_parsers
+
+    depr_msg = "The 'delim_whitespace' keyword in pd.read_table is deprecated"
+
+    if parser.engine == "pyarrow":
+        msg = "The 'delim_whitespace' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            with tm.assert_produces_warning(
+                FutureWarning, match=depr_msg, check_stacklevel=False
+            ):
+                parser.read_table(f, delim_whitespace=True)
+        return
+    with tm.assert_produces_warning(
+        FutureWarning, match=depr_msg, check_stacklevel=False
+    ):
+        result = parser.read_table(f, delim_whitespace=True)
+    expected = DataFrame({"a": [1, 4], "b": [-2, 5], "c": [-3, 6]})
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize("delimiter", [",", "\t"])
+def test_read_csv_delim_whitespace_non_default_sep(all_parsers, delimiter):
+    # GH: 35958
+    f = StringIO("a  b  c\n1 -2 -3\n4  5   6")
+    parser = all_parsers
+    msg = (
+        "Specified a delimiter with both sep and "
+        "delim_whitespace=True; you can only specify one."
+    )
+    depr_msg = "The 'delim_whitespace' keyword in pd.read_csv is deprecated"
+    with tm.assert_produces_warning(
+        FutureWarning, match=depr_msg, check_stacklevel=False
+    ):
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(f, delim_whitespace=True, sep=delimiter)
+
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(f, delim_whitespace=True, delimiter=delimiter)
+
+
+def test_read_csv_delimiter_and_sep_no_default(all_parsers):
+    # GH#39823
+    f = StringIO("a,b\n1,2")
+    parser = all_parsers
+    msg = "Specified a sep and a delimiter; you can only specify one."
+    with pytest.raises(ValueError, match=msg):
+        parser.read_csv(f, sep=" ", delimiter=".")
+
+
+@pytest.mark.parametrize("kwargs", [{"delimiter": "\n"}, {"sep": "\n"}])
+def test_read_csv_line_break_as_separator(kwargs, all_parsers):
+    # GH#43528
+    parser = all_parsers
+    data = """a,b,c
+1,2,3
+    """
+    msg = (
+        r"Specified \\n as separator or delimiter. This forces the python engine "
+        r"which does not accept a line terminator. Hence it is not allowed to use "
+        r"the line terminator as separator."
+    )
+    with pytest.raises(ValueError, match=msg):
+        parser.read_csv(StringIO(data), **kwargs)
+
+
+@pytest.mark.parametrize("delimiter", [",", "\t"])
+def test_read_table_delim_whitespace_non_default_sep(all_parsers, delimiter):
+    # GH: 35958
+    f = StringIO("a  b  c\n1 -2 -3\n4  5   6")
+    parser = all_parsers
+    msg = (
+        "Specified a delimiter with both sep and "
+        "delim_whitespace=True; you can only specify one."
+    )
+    depr_msg = "The 'delim_whitespace' keyword in pd.read_table is deprecated"
+    with tm.assert_produces_warning(
+        FutureWarning, match=depr_msg, check_stacklevel=False
+    ):
+        with pytest.raises(ValueError, match=msg):
+            parser.read_table(f, delim_whitespace=True, sep=delimiter)
+
+        with pytest.raises(ValueError, match=msg):
+            parser.read_table(f, delim_whitespace=True, delimiter=delimiter)
+
+
+@skip_pyarrow
+def test_dict_keys_as_names(all_parsers):
+    # GH: 36928
+    data = "1,2"
+
+    keys = {"a": int, "b": int}.keys()
+    parser = all_parsers
+
+    result = parser.read_csv(StringIO(data), names=keys)
+    expected = DataFrame({"a": [1], "b": [2]})
+    tm.assert_frame_equal(result, expected)
+
+
+@xfail_pyarrow  # UnicodeDecodeError: 'utf-8' codec can't decode byte 0xed in position 0
+def test_encoding_surrogatepass(all_parsers):
+    # GH39017
+    parser = all_parsers
+    content = b"\xed\xbd\xbf"
+    decoded = content.decode("utf-8", errors="surrogatepass")
+    expected = DataFrame({decoded: [decoded]}, index=[decoded * 2])
+    expected.index.name = decoded * 2
+
+    with tm.ensure_clean() as path:
+        Path(path).write_bytes(
+            content * 2 + b"," + content + b"\n" + content * 2 + b"," + content
+        )
+        df = parser.read_csv(path, encoding_errors="surrogatepass", index_col=0)
+        tm.assert_frame_equal(df, expected)
+        with pytest.raises(UnicodeDecodeError, match="'utf-8' codec can't decode byte"):
+            parser.read_csv(path)
+
+
+def test_malformed_second_line(all_parsers):
+    # see GH14782
+    parser = all_parsers
+    data = "\na\nb\n"
+    result = parser.read_csv(StringIO(data), skip_blank_lines=False, header=1)
+    expected = DataFrame({"a": ["b"]})
+    tm.assert_frame_equal(result, expected)
+
+
+@skip_pyarrow
+def test_short_single_line(all_parsers):
+    # GH 47566
+    parser = all_parsers
+    columns = ["a", "b", "c"]
+    data = "1,2"
+    result = parser.read_csv(StringIO(data), header=None, names=columns)
+    expected = DataFrame({"a": [1], "b": [2], "c": [np.nan]})
+    tm.assert_frame_equal(result, expected)
+
+
+@xfail_pyarrow  # ValueError: Length mismatch: Expected axis has 2 elements
+def test_short_multi_line(all_parsers):
+    # GH 47566
+    parser = all_parsers
+    columns = ["a", "b", "c"]
+    data = "1,2\n1,2"
+    result = parser.read_csv(StringIO(data), header=None, names=columns)
+    expected = DataFrame({"a": [1, 1], "b": [2, 2], "c": [np.nan, np.nan]})
+    tm.assert_frame_equal(result, expected)
+
+
+def test_read_seek(all_parsers):
+    # GH48646
+    parser = all_parsers
+    prefix = "### DATA\n"
+    content = "nkey,value\ntables,rectangular\n"
+    with tm.ensure_clean() as path:
+        Path(path).write_text(prefix + content, encoding="utf-8")
+        with open(path, encoding="utf-8") as file:
+            file.readline()
+            actual = parser.read_csv(file)
+        expected = parser.read_csv(StringIO(content))
+    tm.assert_frame_equal(actual, expected)

env-llmeval/lib/python3.10/site-packages/pandas/tests/io/parser/common/test_data_list.py

@@ -0,0 +1,91 @@
+"""
+Tests that work on both the Python and C engines but do not have a
+specific classification into the other test modules.
+"""
+import csv
+from io import StringIO
+
+import pytest
+
+from pandas import DataFrame
+import pandas._testing as tm
+
+from pandas.io.parsers import TextParser
+
+pytestmark = pytest.mark.filterwarnings(
+    "ignore:Passing a BlockManager to DataFrame:DeprecationWarning"
+)
+
+xfail_pyarrow = pytest.mark.usefixtures("pyarrow_xfail")
+
+
+@xfail_pyarrow
+def test_read_data_list(all_parsers):
+    parser = all_parsers
+    kwargs = {"index_col": 0}
+    data = "A,B,C\nfoo,1,2,3\nbar,4,5,6"
+
+    data_list = [["A", "B", "C"], ["foo", "1", "2", "3"], ["bar", "4", "5", "6"]]
+    expected = parser.read_csv(StringIO(data), **kwargs)
+
+    with TextParser(data_list, chunksize=2, **kwargs) as parser:
+        result = parser.read()
+
+    tm.assert_frame_equal(result, expected)
+
+
+def test_reader_list(all_parsers):
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+    parser = all_parsers
+    kwargs = {"index_col": 0}
+
+    lines = list(csv.reader(StringIO(data)))
+    with TextParser(lines, chunksize=2, **kwargs) as reader:
+        chunks = list(reader)
+
+    expected = parser.read_csv(StringIO(data), **kwargs)
+
+    tm.assert_frame_equal(chunks[0], expected[:2])
+    tm.assert_frame_equal(chunks[1], expected[2:4])
+    tm.assert_frame_equal(chunks[2], expected[4:])
+
+
+def test_reader_list_skiprows(all_parsers):
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+    parser = all_parsers
+    kwargs = {"index_col": 0}
+
+    lines = list(csv.reader(StringIO(data)))
+    with TextParser(lines, chunksize=2, skiprows=[1], **kwargs) as reader:
+        chunks = list(reader)
+
+    expected = parser.read_csv(StringIO(data), **kwargs)
+
+    tm.assert_frame_equal(chunks[0], expected[1:3])
+
+
+def test_read_csv_parse_simple_list(all_parsers):
+    parser = all_parsers
+    data = """foo
+bar baz
+qux foo
+foo
+bar"""
+
+    result = parser.read_csv(StringIO(data), header=None)
+    expected = DataFrame(["foo", "bar baz", "qux foo", "foo", "bar"])
+    tm.assert_frame_equal(result, expected)

env-llmeval/lib/python3.10/site-packages/pandas/tests/io/parser/common/test_decimal.py

@@ -0,0 +1,72 @@
+"""
+Tests that work on both the Python and C engines but do not have a
+specific classification into the other test modules.
+"""
+from io import StringIO
+
+import pytest
+
+from pandas import DataFrame
+import pandas._testing as tm
+
+pytestmark = pytest.mark.filterwarnings(
+    "ignore:Passing a BlockManager to DataFrame:DeprecationWarning"
+)
+
+
+@pytest.mark.parametrize(
+    "data,thousands,decimal",
+    [
+        (
+            """A|B|C
+1|2,334.01|5
+10|13|10.
+""",
+            ",",
+            ".",
+        ),
+        (
+            """A|B|C
+1|2.334,01|5
+10|13|10,
+""",
+            ".",
+            ",",
+        ),
+    ],
+)
+def test_1000_sep_with_decimal(all_parsers, data, thousands, decimal):
+    parser = all_parsers
+    expected = DataFrame({"A": [1, 10], "B": [2334.01, 13], "C": [5, 10.0]})
+
+    if parser.engine == "pyarrow":
+        msg = "The 'thousands' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(
+                StringIO(data), sep="|", thousands=thousands, decimal=decimal
+            )
+        return
+
+    result = parser.read_csv(
+        StringIO(data), sep="|", thousands=thousands, decimal=decimal
+    )
+    tm.assert_frame_equal(result, expected)
+
+
+def test_euro_decimal_format(all_parsers):
+    parser = all_parsers
+    data = """Id;Number1;Number2;Text1;Text2;Number3
+1;1521,1541;187101,9543;ABC;poi;4,738797819
+2;121,12;14897,76;DEF;uyt;0,377320872
+3;878,158;108013,434;GHI;rez;2,735694704"""
+
+    result = parser.read_csv(StringIO(data), sep=";", decimal=",")
+    expected = DataFrame(
+        [
+            [1, 1521.1541, 187101.9543, "ABC", "poi", 4.738797819],
+            [2, 121.12, 14897.76, "DEF", "uyt", 0.377320872],
+            [3, 878.158, 108013.434, "GHI", "rez", 2.735694704],
+        ],
+        columns=["Id", "Number1", "Number2", "Text1", "Text2", "Number3"],
+    )
+    tm.assert_frame_equal(result, expected)

env-llmeval/lib/python3.10/site-packages/pandas/tests/io/parser/common/test_file_buffer_url.py

@@ -0,0 +1,478 @@
+"""
+Tests that work on both the Python and C engines but do not have a
+specific classification into the other test modules.
+"""
+from io import (
+    BytesIO,
+    StringIO,
+)
+import os
+import platform
+from urllib.error import URLError
+import uuid
+
+import numpy as np
+import pytest
+
+from pandas.errors import (
+    EmptyDataError,
+    ParserError,
+)
+import pandas.util._test_decorators as td
+
+from pandas import (
+    DataFrame,
+    Index,
+)
+import pandas._testing as tm
+
+pytestmark = pytest.mark.filterwarnings(
+    "ignore:Passing a BlockManager to DataFrame:DeprecationWarning"
+)
+
+xfail_pyarrow = pytest.mark.usefixtures("pyarrow_xfail")
+skip_pyarrow = pytest.mark.usefixtures("pyarrow_skip")
+
+
+@pytest.mark.network
+@pytest.mark.single_cpu
+def test_url(all_parsers, csv_dir_path, httpserver):
+    parser = all_parsers
+    kwargs = {"sep": "\t"}
+
+    local_path = os.path.join(csv_dir_path, "salaries.csv")
+    with open(local_path, encoding="utf-8") as f:
+        httpserver.serve_content(content=f.read())
+
+    url_result = parser.read_csv(httpserver.url, **kwargs)
+
+    local_result = parser.read_csv(local_path, **kwargs)
+    tm.assert_frame_equal(url_result, local_result)
+
+
+@pytest.mark.slow
+def test_local_file(all_parsers, csv_dir_path):
+    parser = all_parsers
+    kwargs = {"sep": "\t"}
+
+    local_path = os.path.join(csv_dir_path, "salaries.csv")
+    local_result = parser.read_csv(local_path, **kwargs)
+    url = "file://localhost/" + local_path
+
+    try:
+        url_result = parser.read_csv(url, **kwargs)
+        tm.assert_frame_equal(url_result, local_result)
+    except URLError:
+        # Fails on some systems.
+        pytest.skip("Failing on: " + " ".join(platform.uname()))
+
+
+@xfail_pyarrow  # AssertionError: DataFrame.index are different
+def test_path_path_lib(all_parsers):
+    parser = all_parsers
+    df = DataFrame(
+        1.1 * np.arange(120).reshape((30, 4)),
+        columns=Index(list("ABCD"), dtype=object),
+        index=Index([f"i-{i}" for i in range(30)], dtype=object),
+    )
+    result = tm.round_trip_pathlib(df.to_csv, lambda p: parser.read_csv(p, index_col=0))
+    tm.assert_frame_equal(df, result)
+
+
+@xfail_pyarrow  # AssertionError: DataFrame.index are different
+def test_path_local_path(all_parsers):
+    parser = all_parsers
+    df = DataFrame(
+        1.1 * np.arange(120).reshape((30, 4)),
+        columns=Index(list("ABCD"), dtype=object),
+        index=Index([f"i-{i}" for i in range(30)], dtype=object),
+    )
+    result = tm.round_trip_localpath(
+        df.to_csv, lambda p: parser.read_csv(p, index_col=0)
+    )
+    tm.assert_frame_equal(df, result)
+
+
+def test_nonexistent_path(all_parsers):
+    # gh-2428: pls no segfault
+    # gh-14086: raise more helpful FileNotFoundError
+    # GH#29233 "File foo" instead of "File b'foo'"
+    parser = all_parsers
+    path = f"{uuid.uuid4()}.csv"
+
+    msg = r"\[Errno 2\]"
+    with pytest.raises(FileNotFoundError, match=msg) as e:
+        parser.read_csv(path)
+    assert path == e.value.filename
+
+
+@td.skip_if_windows  # os.chmod does not work in windows
+def test_no_permission(all_parsers):
+    # GH 23784
+    parser = all_parsers
+
+    msg = r"\[Errno 13\]"
+    with tm.ensure_clean() as path:
+        os.chmod(path, 0)  # make file unreadable
+
+        # verify that this process cannot open the file (not running as sudo)
+        try:
+            with open(path, encoding="utf-8"):
+                pass
+            pytest.skip("Running as sudo.")
+        except PermissionError:
+            pass
+
+        with pytest.raises(PermissionError, match=msg) as e:
+            parser.read_csv(path)
+        assert path == e.value.filename
+
+
+@pytest.mark.parametrize(
+    "data,kwargs,expected,msg",
+    [
+        # gh-10728: WHITESPACE_LINE
+        (
+            "a,b,c\n4,5,6\n ",
+            {},
+            DataFrame([[4, 5, 6]], columns=["a", "b", "c"]),
+            None,
+        ),
+        # gh-10548: EAT_LINE_COMMENT
+        (
+            "a,b,c\n4,5,6\n#comment",
+            {"comment": "#"},
+            DataFrame([[4, 5, 6]], columns=["a", "b", "c"]),
+            None,
+        ),
+        # EAT_CRNL_NOP
+        (
+            "a,b,c\n4,5,6\n\r",
+            {},
+            DataFrame([[4, 5, 6]], columns=["a", "b", "c"]),
+            None,
+        ),
+        # EAT_COMMENT
+        (
+            "a,b,c\n4,5,6#comment",
+            {"comment": "#"},
+            DataFrame([[4, 5, 6]], columns=["a", "b", "c"]),
+            None,
+        ),
+        # SKIP_LINE
+        (
+            "a,b,c\n4,5,6\nskipme",
+            {"skiprows": [2]},
+            DataFrame([[4, 5, 6]], columns=["a", "b", "c"]),
+            None,
+        ),
+        # EAT_LINE_COMMENT
+        (
+            "a,b,c\n4,5,6\n#comment",
+            {"comment": "#", "skip_blank_lines": False},
+            DataFrame([[4, 5, 6]], columns=["a", "b", "c"]),
+            None,
+        ),
+        # IN_FIELD
+        (
+            "a,b,c\n4,5,6\n ",
+            {"skip_blank_lines": False},
+            DataFrame([["4", 5, 6], [" ", None, None]], columns=["a", "b", "c"]),
+            None,
+        ),
+        # EAT_CRNL
+        (
+            "a,b,c\n4,5,6\n\r",
+            {"skip_blank_lines": False},
+            DataFrame([[4, 5, 6], [None, None, None]], columns=["a", "b", "c"]),
+            None,
+        ),
+        # ESCAPED_CHAR
+        (
+            "a,b,c\n4,5,6\n\\",
+            {"escapechar": "\\"},
+            None,
+            "(EOF following escape character)|(unexpected end of data)",
+        ),
+        # ESCAPE_IN_QUOTED_FIELD
+        (
+            'a,b,c\n4,5,6\n"\\',
+            {"escapechar": "\\"},
+            None,
+            "(EOF inside string starting at row 2)|(unexpected end of data)",
+        ),
+        # IN_QUOTED_FIELD
+        (
+            'a,b,c\n4,5,6\n"',
+            {"escapechar": "\\"},
+            None,
+            "(EOF inside string starting at row 2)|(unexpected end of data)",
+        ),
+    ],
+    ids=[
+        "whitespace-line",
+        "eat-line-comment",
+        "eat-crnl-nop",
+        "eat-comment",
+        "skip-line",
+        "eat-line-comment",
+        "in-field",
+        "eat-crnl",
+        "escaped-char",
+        "escape-in-quoted-field",
+        "in-quoted-field",
+    ],
+)
+def test_eof_states(all_parsers, data, kwargs, expected, msg, request):
+    # see gh-10728, gh-10548
+    parser = all_parsers
+
+    if parser.engine == "pyarrow" and "comment" in kwargs:
+        msg = "The 'comment' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), **kwargs)
+        return
+
+    if parser.engine == "pyarrow" and "\r" not in data:
+        # pandas.errors.ParserError: CSV parse error: Expected 3 columns, got 1:
+        # ValueError: skiprows argument must be an integer when using engine='pyarrow'
+        # AssertionError: Regex pattern did not match.
+        pytest.skip(reason="https://github.com/apache/arrow/issues/38676")
+
+    if expected is None:
+        with pytest.raises(ParserError, match=msg):
+            parser.read_csv(StringIO(data), **kwargs)
+    else:
+        result = parser.read_csv(StringIO(data), **kwargs)
+        tm.assert_frame_equal(result, expected)
+
+
+def test_temporary_file(all_parsers):
+    # see gh-13398
+    parser = all_parsers
+    data = "0 0"
+
+    with tm.ensure_clean(mode="w+", return_filelike=True) as new_file:
+        new_file.write(data)
+        new_file.flush()
+        new_file.seek(0)
+
+        if parser.engine == "pyarrow":
+            msg = "the 'pyarrow' engine does not support regex separators"
+            with pytest.raises(ValueError, match=msg):
+                parser.read_csv(new_file, sep=r"\s+", header=None)
+            return
+
+        result = parser.read_csv(new_file, sep=r"\s+", header=None)
+
+        expected = DataFrame([[0, 0]])
+        tm.assert_frame_equal(result, expected)
+
+
+def test_internal_eof_byte(all_parsers):
+    # see gh-5500
+    parser = all_parsers
+    data = "a,b\n1\x1a,2"
+
+    expected = DataFrame([["1\x1a", 2]], columns=["a", "b"])
+    result = parser.read_csv(StringIO(data))
+    tm.assert_frame_equal(result, expected)
+
+
+def test_internal_eof_byte_to_file(all_parsers):
+    # see gh-16559
+    parser = all_parsers
+    data = b'c1,c2\r\n"test \x1a    test", test\r\n'
+    expected = DataFrame([["test \x1a    test", " test"]], columns=["c1", "c2"])
+    path = f"__{uuid.uuid4()}__.csv"
+
+    with tm.ensure_clean(path) as path:
+        with open(path, "wb") as f:
+            f.write(data)
+
+        result = parser.read_csv(path)
+        tm.assert_frame_equal(result, expected)
+
+
+def test_file_handle_string_io(all_parsers):
+    # gh-14418
+    #
+    # Don't close user provided file handles.
+    parser = all_parsers
+    data = "a,b\n1,2"
+
+    fh = StringIO(data)
+    parser.read_csv(fh)
+    assert not fh.closed
+
+
+def test_file_handles_with_open(all_parsers, csv1):
+    # gh-14418
+    #
+    # Don't close user provided file handles.
+    parser = all_parsers
+
+    for mode in ["r", "rb"]:
+        with open(csv1, mode, encoding="utf-8" if mode == "r" else None) as f:
+            parser.read_csv(f)
+            assert not f.closed
+
+
+def test_invalid_file_buffer_class(all_parsers):
+    # see gh-15337
+    class InvalidBuffer:
+        pass
+
+    parser = all_parsers
+    msg = "Invalid file path or buffer object type"
+
+    with pytest.raises(ValueError, match=msg):
+        parser.read_csv(InvalidBuffer())
+
+
+def test_invalid_file_buffer_mock(all_parsers):
+    # see gh-15337
+    parser = all_parsers
+    msg = "Invalid file path or buffer object type"
+
+    class Foo:
+        pass
+
+    with pytest.raises(ValueError, match=msg):
+        parser.read_csv(Foo())
+
+
+def test_valid_file_buffer_seems_invalid(all_parsers):
+    # gh-16135: we want to ensure that "tell" and "seek"
+    # aren't actually being used when we call `read_csv`
+    #
+    # Thus, while the object may look "invalid" (these
+    # methods are attributes of the `StringIO` class),
+    # it is still a valid file-object for our purposes.
+    class NoSeekTellBuffer(StringIO):
+        def tell(self):
+            raise AttributeError("No tell method")
+
+        def seek(self, pos, whence=0):
+            raise AttributeError("No seek method")
+
+    data = "a\n1"
+    parser = all_parsers
+    expected = DataFrame({"a": [1]})
+
+    result = parser.read_csv(NoSeekTellBuffer(data))
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.parametrize("io_class", [StringIO, BytesIO])
+@pytest.mark.parametrize("encoding", [None, "utf-8"])
+def test_read_csv_file_handle(all_parsers, io_class, encoding):
+    """
+    Test whether read_csv does not close user-provided file handles.
+
+    GH 36980
+    """
+    parser = all_parsers
+    expected = DataFrame({"a": [1], "b": [2]})
+
+    content = "a,b\n1,2"
+    handle = io_class(content.encode("utf-8") if io_class == BytesIO else content)
+
+    tm.assert_frame_equal(parser.read_csv(handle, encoding=encoding), expected)
+    assert not handle.closed
+
+
+def test_memory_map_compression(all_parsers, compression):
+    """
+    Support memory map for compressed files.
+
+    GH 37621
+    """
+    parser = all_parsers
+    expected = DataFrame({"a": [1], "b": [2]})
+
+    with tm.ensure_clean() as path:
+        expected.to_csv(path, index=False, compression=compression)
+
+        if parser.engine == "pyarrow":
+            msg = "The 'memory_map' option is not supported with the 'pyarrow' engine"
+            with pytest.raises(ValueError, match=msg):
+                parser.read_csv(path, memory_map=True, compression=compression)
+            return
+
+        result = parser.read_csv(path, memory_map=True, compression=compression)
+
+    tm.assert_frame_equal(
+        result,
+        expected,
+    )
+
+
+def test_context_manager(all_parsers, datapath):
+    # make sure that opened files are closed
+    parser = all_parsers
+
+    path = datapath("io", "data", "csv", "iris.csv")
+
+    if parser.engine == "pyarrow":
+        msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(path, chunksize=1)
+        return
+
+    reader = parser.read_csv(path, chunksize=1)
+    assert not reader.handles.handle.closed
+    try:
+        with reader:
+            next(reader)
+            assert False
+    except AssertionError:
+        assert reader.handles.handle.closed
+
+
+def test_context_manageri_user_provided(all_parsers, datapath):
+    # make sure that user-provided handles are not closed
+    parser = all_parsers
+
+    with open(datapath("io", "data", "csv", "iris.csv"), encoding="utf-8") as path:
+        if parser.engine == "pyarrow":
+            msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+            with pytest.raises(ValueError, match=msg):
+                parser.read_csv(path, chunksize=1)
+            return
+
+        reader = parser.read_csv(path, chunksize=1)
+        assert not reader.handles.handle.closed
+        try:
+            with reader:
+                next(reader)
+                assert False
+        except AssertionError:
+            assert not reader.handles.handle.closed
+
+
+@skip_pyarrow  # ParserError: Empty CSV file
+def test_file_descriptor_leak(all_parsers, using_copy_on_write):
+    # GH 31488
+    parser = all_parsers
+    with tm.ensure_clean() as path:
+        with pytest.raises(EmptyDataError, match="No columns to parse from file"):
+            parser.read_csv(path)
+
+
+def test_memory_map(all_parsers, csv_dir_path):
+    mmap_file = os.path.join(csv_dir_path, "test_mmap.csv")
+    parser = all_parsers
+
+    expected = DataFrame(
+        {"a": [1, 2, 3], "b": ["one", "two", "three"], "c": ["I", "II", "III"]}
+    )
+
+    if parser.engine == "pyarrow":
+        msg = "The 'memory_map' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(mmap_file, memory_map=True)
+        return
+
+    result = parser.read_csv(mmap_file, memory_map=True)
+    tm.assert_frame_equal(result, expected)

env-llmeval/lib/python3.10/site-packages/pandas/tests/io/parser/common/test_float.py

@@ -0,0 +1,79 @@
+"""
+Tests that work on both the Python and C engines but do not have a
+specific classification into the other test modules.
+"""
+from io import StringIO
+
+import numpy as np
+import pytest
+
+from pandas.compat import is_platform_linux
+
+from pandas import DataFrame
+import pandas._testing as tm
+
+pytestmark = pytest.mark.filterwarnings(
+    "ignore:Passing a BlockManager to DataFrame:DeprecationWarning"
+)
+xfail_pyarrow = pytest.mark.usefixtures("pyarrow_xfail")
+skip_pyarrow = pytest.mark.usefixtures("pyarrow_skip")
+
+
+@skip_pyarrow  # ParserError: CSV parse error: Empty CSV file or block
+def test_float_parser(all_parsers):
+    # see gh-9565
+    parser = all_parsers
+    data = "45e-1,4.5,45.,inf,-inf"
+    result = parser.read_csv(StringIO(data), header=None)
+
+    expected = DataFrame([[float(s) for s in data.split(",")]])
+    tm.assert_frame_equal(result, expected)
+
+
+def test_scientific_no_exponent(all_parsers_all_precisions):
+    # see gh-12215
+    df = DataFrame.from_dict({"w": ["2e"], "x": ["3E"], "y": ["42e"], "z": ["632E"]})
+    data = df.to_csv(index=False)
+    parser, precision = all_parsers_all_precisions
+
+    df_roundtrip = parser.read_csv(StringIO(data), float_precision=precision)
+    tm.assert_frame_equal(df_roundtrip, df)
+
+
+@pytest.mark.parametrize(
+    "neg_exp",
+    [
+        -617,
+        -100000,
+        pytest.param(-99999999999999999, marks=pytest.mark.skip_ubsan),
+    ],
+)
+def test_very_negative_exponent(all_parsers_all_precisions, neg_exp):
+    # GH#38753
+    parser, precision = all_parsers_all_precisions
+
+    data = f"data\n10E{neg_exp}"
+    result = parser.read_csv(StringIO(data), float_precision=precision)
+    expected = DataFrame({"data": [0.0]})
+    tm.assert_frame_equal(result, expected)
+
+
+@pytest.mark.skip_ubsan
+@xfail_pyarrow  # AssertionError: Attributes of DataFrame.iloc[:, 0] are different
+@pytest.mark.parametrize("exp", [999999999999999999, -999999999999999999])
+def test_too_many_exponent_digits(all_parsers_all_precisions, exp, request):
+    # GH#38753
+    parser, precision = all_parsers_all_precisions
+    data = f"data\n10E{exp}"
+    result = parser.read_csv(StringIO(data), float_precision=precision)
+    if precision == "round_trip":
+        if exp == 999999999999999999 and is_platform_linux():
+            mark = pytest.mark.xfail(reason="GH38794, on Linux gives object result")
+            request.applymarker(mark)
+
+        value = np.inf if exp > 0 else 0.0
+        expected = DataFrame({"data": [value]})
+    else:
+        expected = DataFrame({"data": [f"10E{exp}"]})
+
+    tm.assert_frame_equal(result, expected)

env-llmeval/lib/python3.10/site-packages/pandas/tests/io/parser/common/test_inf.py

@@ -0,0 +1,78 @@
+"""
+Tests that work on both the Python and C engines but do not have a
+specific classification into the other test modules.
+"""
+from io import StringIO
+
+import numpy as np
+import pytest
+
+from pandas import (
+    DataFrame,
+    option_context,
+)
+import pandas._testing as tm
+
+pytestmark = pytest.mark.filterwarnings(
+    "ignore:Passing a BlockManager to DataFrame:DeprecationWarning"
+)
+
+xfail_pyarrow = pytest.mark.usefixtures("pyarrow_xfail")
+
+
+@xfail_pyarrow  # AssertionError: DataFrame.index are different
+@pytest.mark.parametrize("na_filter", [True, False])
+def test_inf_parsing(all_parsers, na_filter):
+    parser = all_parsers
+    data = """\
+,A
+a,inf
+b,-inf
+c,+Inf
+d,-Inf
+e,INF
+f,-INF
+g,+INf
+h,-INf
+i,inF
+j,-inF"""
+    expected = DataFrame(
+        {"A": [float("inf"), float("-inf")] * 5},
+        index=["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"],
+    )
+    result = parser.read_csv(StringIO(data), index_col=0, na_filter=na_filter)
+    tm.assert_frame_equal(result, expected)
+
+
+@xfail_pyarrow  # AssertionError: DataFrame.index are different
+@pytest.mark.parametrize("na_filter", [True, False])
+def test_infinity_parsing(all_parsers, na_filter):
+    parser = all_parsers
+    data = """\
+,A
+a,Infinity
+b,-Infinity
+c,+Infinity
+"""
+    expected = DataFrame(
+        {"A": [float("infinity"), float("-infinity"), float("+infinity")]},
+        index=["a", "b", "c"],
+    )
+    result = parser.read_csv(StringIO(data), index_col=0, na_filter=na_filter)
+    tm.assert_frame_equal(result, expected)
+
+
+def test_read_csv_with_use_inf_as_na(all_parsers):
+    # https://github.com/pandas-dev/pandas/issues/35493
+    parser = all_parsers
+    data = "1.0\nNaN\n3.0"
+    msg = "use_inf_as_na option is deprecated"
+    warn = FutureWarning
+    if parser.engine == "pyarrow":
+        warn = (FutureWarning, DeprecationWarning)
+
+    with tm.assert_produces_warning(warn, match=msg, check_stacklevel=False):
+        with option_context("use_inf_as_na", True):
+            result = parser.read_csv(StringIO(data), header=None)
+    expected = DataFrame([1.0, np.nan, 3.0])
+    tm.assert_frame_equal(result, expected)

env-llmeval/lib/python3.10/site-packages/pandas/tests/io/parser/common/test_iterator.py

@@ -0,0 +1,134 @@
+"""
+Tests that work on both the Python and C engines but do not have a
+specific classification into the other test modules.
+"""
+from io import StringIO
+
+import pytest
+
+from pandas import (
+    DataFrame,
+    concat,
+)
+import pandas._testing as tm
+
+pytestmark = pytest.mark.filterwarnings(
+    "ignore:Passing a BlockManager to DataFrame:DeprecationWarning"
+)
+
+
+def test_iterator(all_parsers):
+    # see gh-6607
+    data = """index,A,B,C,D
+foo,2,3,4,5
+bar,7,8,9,10
+baz,12,13,14,15
+qux,12,13,14,15
+foo2,12,13,14,15
+bar2,12,13,14,15
+"""
+    parser = all_parsers
+    kwargs = {"index_col": 0}
+
+    expected = parser.read_csv(StringIO(data), **kwargs)
+
+    if parser.engine == "pyarrow":
+        msg = "The 'iterator' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), iterator=True, **kwargs)
+        return
+
+    with parser.read_csv(StringIO(data), iterator=True, **kwargs) as reader:
+        first_chunk = reader.read(3)
+        tm.assert_frame_equal(first_chunk, expected[:3])
+
+        last_chunk = reader.read(5)
+    tm.assert_frame_equal(last_chunk, expected[3:])
+
+
+def test_iterator2(all_parsers):
+    parser = all_parsers
+    data = """A,B,C
+foo,1,2,3
+bar,4,5,6
+baz,7,8,9
+"""
+
+    if parser.engine == "pyarrow":
+        msg = "The 'iterator' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), iterator=True)
+        return
+
+    with parser.read_csv(StringIO(data), iterator=True) as reader:
+        result = list(reader)
+
+    expected = DataFrame(
+        [[1, 2, 3], [4, 5, 6], [7, 8, 9]],
+        index=["foo", "bar", "baz"],
+        columns=["A", "B", "C"],
+    )
+    tm.assert_frame_equal(result[0], expected)
+
+
+def test_iterator_stop_on_chunksize(all_parsers):
+    # gh-3967: stopping iteration when chunksize is specified
+    parser = all_parsers
+    data = """A,B,C
+foo,1,2,3
+bar,4,5,6
+baz,7,8,9
+"""
+    if parser.engine == "pyarrow":
+        msg = "The 'chunksize' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(StringIO(data), chunksize=1)
+        return
+
+    with parser.read_csv(StringIO(data), chunksize=1) as reader:
+        result = list(reader)
+
+    assert len(result) == 3
+    expected = DataFrame(
+        [[1, 2, 3], [4, 5, 6], [7, 8, 9]],
+        index=["foo", "bar", "baz"],
+        columns=["A", "B", "C"],
+    )
+    tm.assert_frame_equal(concat(result), expected)
+
+
+@pytest.mark.parametrize(
+    "kwargs", [{"iterator": True, "chunksize": 1}, {"iterator": True}, {"chunksize": 1}]
+)
+def test_iterator_skipfooter_errors(all_parsers, kwargs):
+    msg = "'skipfooter' not supported for iteration"
+    parser = all_parsers
+    data = "a\n1\n2"
+
+    if parser.engine == "pyarrow":
+        msg = (
+            "The '(chunksize|iterator)' option is not supported with the "
+            "'pyarrow' engine"
+        )
+
+    with pytest.raises(ValueError, match=msg):
+        with parser.read_csv(StringIO(data), skipfooter=1, **kwargs) as _:
+            pass
+
+
+def test_iteration_open_handle(all_parsers):
+    parser = all_parsers
+    kwargs = {"header": None}
+
+    with tm.ensure_clean() as path:
+        with open(path, "w", encoding="utf-8") as f:
+            f.write("AAA\nBBB\nCCC\nDDD\nEEE\nFFF\nGGG")
+
+        with open(path, encoding="utf-8") as f:
+            for line in f:
+                if "CCC" in line:
+                    break
+
+            result = parser.read_csv(f, **kwargs)
+            expected = DataFrame({0: ["DDD", "EEE", "FFF", "GGG"]})
+            tm.assert_frame_equal(result, expected)

env-llmeval/lib/python3.10/site-packages/pandas/tests/io/parser/common/test_read_errors.py

@@ -0,0 +1,320 @@
+"""
+Tests that work on the Python, C and PyArrow engines but do not have a
+specific classification into the other test modules.
+"""
+import codecs
+import csv
+from io import StringIO
+import os
+from pathlib import Path
+
+import numpy as np
+import pytest
+
+from pandas.compat import PY311
+from pandas.errors import (
+    EmptyDataError,
+    ParserError,
+    ParserWarning,
+)
+
+from pandas import DataFrame
+import pandas._testing as tm
+
+xfail_pyarrow = pytest.mark.usefixtures("pyarrow_xfail")
+skip_pyarrow = pytest.mark.usefixtures("pyarrow_skip")
+
+
+def test_empty_decimal_marker(all_parsers):
+    data = """A|B|C
+1|2,334|5
+10|13|10.
+"""
+    # Parsers support only length-1 decimals
+    msg = "Only length-1 decimal markers supported"
+    parser = all_parsers
+
+    if parser.engine == "pyarrow":
+        msg = (
+            "only single character unicode strings can be "
+            "converted to Py_UCS4, got length 0"
+        )
+
+    with pytest.raises(ValueError, match=msg):
+        parser.read_csv(StringIO(data), decimal="")
+
+
+def test_bad_stream_exception(all_parsers, csv_dir_path):
+    # see gh-13652
+    #
+    # This test validates that both the Python engine and C engine will
+    # raise UnicodeDecodeError instead of C engine raising ParserError
+    # and swallowing the exception that caused read to fail.
+    path = os.path.join(csv_dir_path, "sauron.SHIFT_JIS.csv")
+    codec = codecs.lookup("utf-8")
+    utf8 = codecs.lookup("utf-8")
+    parser = all_parsers
+    msg = "'utf-8' codec can't decode byte"
+
+    # Stream must be binary UTF8.
+    with open(path, "rb") as handle, codecs.StreamRecoder(
+        handle, utf8.encode, utf8.decode, codec.streamreader, codec.streamwriter
+    ) as stream:
+        with pytest.raises(UnicodeDecodeError, match=msg):
+            parser.read_csv(stream)
+
+
+def test_malformed(all_parsers):
+    # see gh-6607
+    parser = all_parsers
+    data = """ignore
+A,B,C
+1,2,3 # comment
+1,2,3,4,5
+2,3,4
+"""
+    msg = "Expected 3 fields in line 4, saw 5"
+    err = ParserError
+    if parser.engine == "pyarrow":
+        msg = "The 'comment' option is not supported with the 'pyarrow' engine"
+        err = ValueError
+    with pytest.raises(err, match=msg):
+        parser.read_csv(StringIO(data), header=1, comment="#")
+
+
+@pytest.mark.parametrize("nrows", [5, 3, None])
+def test_malformed_chunks(all_parsers, nrows):
+    data = """ignore
+A,B,C
+skip
+1,2,3
+3,5,10 # comment
+1,2,3,4,5
+2,3,4
+"""
+    parser = all_parsers
+
+    if parser.engine == "pyarrow":
+        msg = "The 'iterator' option is not supported with the 'pyarrow' engine"
+        with pytest.raises(ValueError, match=msg):
+            parser.read_csv(
+                StringIO(data),
+                header=1,
+                comment="#",
+                iterator=True,
+                chunksize=1,
+                skiprows=[2],
+            )
+        return
+
+    msg = "Expected 3 fields in line 6, saw 5"
+    with parser.read_csv(
+        StringIO(data), header=1, comment="#", iterator=True, chunksize=1, skiprows=[2]
+    ) as reader:
+        with pytest.raises(ParserError, match=msg):
+            reader.read(nrows)
+
+
+@xfail_pyarrow  # does not raise
+def test_catch_too_many_names(all_parsers):
+    # see gh-5156
+    data = """\
+1,2,3
+4,,6
+7,8,9
+10,11,12\n"""
+    parser = all_parsers
+    msg = (
+        "Too many columns specified: expected 4 and found 3"
+        if parser.engine == "c"
+        else "Number of passed names did not match "
+        "number of header fields in the file"
+    )
+
+    with pytest.raises(ValueError, match=msg):
+        parser.read_csv(StringIO(data), header=0, names=["a", "b", "c", "d"])
+
+
+@skip_pyarrow  # CSV parse error: Empty CSV file or block
+@pytest.mark.parametrize("nrows", [0, 1, 2, 3, 4, 5])
+def test_raise_on_no_columns(all_parsers, nrows):
+    parser = all_parsers
+    data = "\n" * nrows
+
+    msg = "No columns to parse from file"
+    with pytest.raises(EmptyDataError, match=msg):
+        parser.read_csv(StringIO(data))
+
+
+def test_unexpected_keyword_parameter_exception(all_parsers):
+    # GH-34976
+    parser = all_parsers
+
+    msg = "{}\\(\\) got an unexpected keyword argument 'foo'"
+    with pytest.raises(TypeError, match=msg.format("read_csv")):
+        parser.read_csv("foo.csv", foo=1)
+    with pytest.raises(TypeError, match=msg.format("read_table")):
+        parser.read_table("foo.tsv", foo=1)
+
+
+def test_suppress_error_output(all_parsers):
+    # see gh-15925
+    parser = all_parsers
+    data = "a\n1\n1,2,3\n4\n5,6,7"
+    expected = DataFrame({"a": [1, 4]})
+
+    result = parser.read_csv(StringIO(data), on_bad_lines="skip")
+    tm.assert_frame_equal(result, expected)
+
+
+def test_error_bad_lines(all_parsers):
+    # see gh-15925
+    parser = all_parsers
+    data = "a\n1\n1,2,3\n4\n5,6,7"
+
+    msg = "Expected 1 fields in line 3, saw 3"
+
+    if parser.engine == "pyarrow":
+        # "CSV parse error: Expected 1 columns, got 3: 1,2,3"
+        pytest.skip(reason="https://github.com/apache/arrow/issues/38676")
+
+    with pytest.raises(ParserError, match=msg):
+        parser.read_csv(StringIO(data), on_bad_lines="error")
+
+
+def test_warn_bad_lines(all_parsers):
+    # see gh-15925
+    parser = all_parsers
+    data = "a\n1\n1,2,3\n4\n5,6,7"
+    expected = DataFrame({"a": [1, 4]})
+    match_msg = "Skipping line"
+
+    expected_warning = ParserWarning
+    if parser.engine == "pyarrow":
+        match_msg = "Expected 1 columns, but found 3: 1,2,3"
+        expected_warning = (ParserWarning, DeprecationWarning)
+
+    with tm.assert_produces_warning(
+        expected_warning, match=match_msg, check_stacklevel=False
+    ):
+        result = parser.read_csv(StringIO(data), on_bad_lines="warn")
+    tm.assert_frame_equal(result, expected)
+
+
+def test_read_csv_wrong_num_columns(all_parsers):
+    # Too few columns.
+    data = """A,B,C,D,E,F
+1,2,3,4,5,6
+6,7,8,9,10,11,12
+11,12,13,14,15,16
+"""
+    parser = all_parsers
+    msg = "Expected 6 fields in line 3, saw 7"
+
+    if parser.engine == "pyarrow":
+        # Expected 6 columns, got 7: 6,7,8,9,10,11,12
+        pytest.skip(reason="https://github.com/apache/arrow/issues/38676")
+
+    with pytest.raises(ParserError, match=msg):
+        parser.read_csv(StringIO(data))
+
+
+def test_null_byte_char(request, all_parsers):
+    # see gh-2741
+    data = "\x00,foo"
+    names = ["a", "b"]
+    parser = all_parsers
+
+    if parser.engine == "c" or (parser.engine == "python" and PY311):
+        if parser.engine == "python" and PY311:
+            request.applymarker(
+                pytest.mark.xfail(
+                    reason="In Python 3.11, this is read as an empty character not null"
+                )
+            )
+        expected = DataFrame([[np.nan, "foo"]], columns=names)
+        out = parser.read_csv(StringIO(data), names=names)
+        tm.assert_frame_equal(out, expected)
+    else:
+        if parser.engine == "pyarrow":
+            # CSV parse error: Empty CSV file or block: "
+            # cannot infer number of columns"
+            pytest.skip(reason="https://github.com/apache/arrow/issues/38676")
+        else:
+            msg = "NULL byte detected"
+        with pytest.raises(ParserError, match=msg):
+            parser.read_csv(StringIO(data), names=names)
+
+
+@pytest.mark.filterwarnings("always::ResourceWarning")
+def test_open_file(request, all_parsers):
+    # GH 39024
+    parser = all_parsers
+
+    msg = "Could not determine delimiter"
+    err = csv.Error
+    if parser.engine == "c":
+        msg = "the 'c' engine does not support sep=None with delim_whitespace=False"
+        err = ValueError
+    elif parser.engine == "pyarrow":
+        msg = (
+            "the 'pyarrow' engine does not support sep=None with delim_whitespace=False"
+        )
+        err = ValueError
+
+    with tm.ensure_clean() as path:
+        file = Path(path)
+        file.write_bytes(b"\xe4\na\n1")
+
+        with tm.assert_produces_warning(None):
+            # should not trigger a ResourceWarning
+            with pytest.raises(err, match=msg):
+                parser.read_csv(file, sep=None, encoding_errors="replace")
+
+
+def test_invalid_on_bad_line(all_parsers):
+    parser = all_parsers
+    data = "a\n1\n1,2,3\n4\n5,6,7"
+    with pytest.raises(ValueError, match="Argument abc is invalid for on_bad_lines"):
+        parser.read_csv(StringIO(data), on_bad_lines="abc")
+
+
+def test_bad_header_uniform_error(all_parsers):
+    parser = all_parsers
+    data = "+++123456789...\ncol1,col2,col3,col4\n1,2,3,4\n"
+    msg = "Expected 2 fields in line 2, saw 4"
+    if parser.engine == "c":
+        msg = (
+            "Could not construct index. Requested to use 1 "
+            "number of columns, but 3 left to parse."
+        )
+    elif parser.engine == "pyarrow":
+        # "CSV parse error: Expected 1 columns, got 4: col1,col2,col3,col4"
+        pytest.skip(reason="https://github.com/apache/arrow/issues/38676")
+
+    with pytest.raises(ParserError, match=msg):
+        parser.read_csv(StringIO(data), index_col=0, on_bad_lines="error")
+
+
+def test_on_bad_lines_warn_correct_formatting(all_parsers):
+    # see gh-15925
+    parser = all_parsers
+    data = """1,2
+a,b
+a,b,c
+a,b,d
+a,b
+"""
+    expected = DataFrame({"1": "a", "2": ["b"] * 2})
+    match_msg = "Skipping line"
+
+    expected_warning = ParserWarning
+    if parser.engine == "pyarrow":
+        match_msg = "Expected 2 columns, but found 3: a,b,c"
+        expected_warning = (ParserWarning, DeprecationWarning)
+
+    with tm.assert_produces_warning(
+        expected_warning, match=match_msg, check_stacklevel=False
+    ):
+        result = parser.read_csv(StringIO(data), on_bad_lines="warn")
+    tm.assert_frame_equal(result, expected)