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# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
#
import json
from pathlib import Path
from typing import Iterable, Sequence
from cc_net import dedup, jsonql
from cc_net.dedup import str_hash
from cc_net.flat_hash_set import FlatHashSet
def text(*args: str) -> str:
return "\n".join(args)
def write_docs(file: Path, docs: Iterable[Sequence[str]]):
file.parent.mkdir(exist_ok=True)
with open(file, "w") as f:
for sentences in docs:
doc = dict(text=text(*sentences))
print(json.dumps(doc), file=f)
def as_dict(hash_set):
if not isinstance(hash_set, dict):
hash_set = {k: v for (k, v) in hash_set.items()}
return hash_set
def load_hashes(file):
results = dedup.FlatHashSet()
results.load(file)
return as_dict(results)
LENGTHS = ["original_length", "length"]
def assert_documents_equal(expected, actual, ignoring={}):
expected = [{k: doc[k] for k in doc if k not in ignoring} for doc in expected]
actual = [{k: doc[k] for k in doc if k not in ignoring} for doc in expected]
assert expected == actual
def test_simple_dedup(tmp_path: Path) -> None:
write_docs(
tmp_path / "docs.json",
[
["_Hello", "_World", "I'm so original"],
["_world", "I'm originaler", "_Hello"],
],
)
results = list(dedup.deduplicate(tmp_path / "docs.json", field="text"))
expected = [
# First document is untouched
dict(
text=text("_Hello", "_World", "I'm so original"),
original_nlines=3,
nlines=3,
line_ids=[0, 1, 2],
),
# Second documents loses several lines
dict(text="I'm originaler", original_nlines=3, nlines=1, line_ids=[1]),
]
assert_documents_equal(expected, results, ignoring=LENGTHS)
def test_dedup_with_dump(tmp_path: Path):
hashes = tmp_path / "hashes.bin"
documents = [
dict(text=text("_Hello", "_World", "I'm so original")),
dict(text=text("_world", "I'm originaler", "_Hello")),
]
collector = dedup.HashesCollector(field="text", output=hashes)
list(collector.map(documents))
results = load_hashes(hashes)
expected = {
str_hash(l): l.startswith("_")
for l in ["_hello", "_world", "i'm so original", "i'm originaler"]
}
assert expected == results
def test_dedup_with_np_dump(tmp_path: Path):
hashes = tmp_path / "hashes.bin"
documents = [
dict(text=text("_Hello", "_World", "I'm so original")),
dict(text=text("_world", "I'm originaler", "_Hello")),
]
with dedup.HashesCollector(field="text", output=hashes) as d:
list(d.map(documents))
results = FlatHashSet()
results.load_np(hashes)
expected = set(
str_hash(l) for l in ["_hello", "_world", "i'm so original", "i'm originaler"]
)
assert expected == set(results.keys())
def test_dedup_from_hashes(tmp_path: Path):
documents = [
dict(text=text("_Hello", "World", "I'm so original")),
dict(text=text("Good morning", "World", "I'm originaler")),
]
seen = ["_hello", "i'm originaler", "world"]
hashes = [str_hash(h) for h in seen]
h = dedup.FlatHashSet()
h.add(hashes)
# Note: 'world' appears only once and won't be treated as a duplicate.
h.add(hashes[:-1])
h.dump(tmp_path / "hashes.bin")
results = list(
dedup.DuplicatesRemover("text", [tmp_path / "hashes.bin"]).map(documents)
)
expected = [
dict(
text=text("World", "I'm so original"),
original_nlines=3,
nlines=2,
line_ids=[1, 2],
),
dict(
text=text("Good morning", "World"),
original_nlines=3,
nlines=2,
line_ids=[0, 1],
),
]
assert_documents_equal(expected, results, ignoring=LENGTHS)
def test_dedup_fast(tmp_path: Path):
data = tmp_path / "data"
part_0 = [["Hello", "_World", "I'm so original"]]
write_docs(data / "part_0.json", part_0)
part_1 = [["Good morning", "_World", "I'm originaler"]]
write_docs(data / "part_1.json", part_1)
parts = [data / "part_0.json", data / "part_1.json"]
res = tmp_path / "res"
res.mkdir()
h = tmp_path / "hashes.bin"
field = "text"
jsonql.run_pipes(dedup.HashesCollector(field, output=h), file=parts)
for part in parts:
jsonql.run_pipes(
dedup.DuplicatesRemover(field, [h]), file=part, output=res / part.name
)
jsonql.run_pipes(
dedup.DuplicatesRemover(field, [h]), file=part, output=res / part.name
)
results_0 = list(jsonql.read_jsons(res / "part_0.json"))
expected_0 = [
dict(
text=text("Hello", "I'm so original"),
original_nlines=3,
nlines=2,
line_ids=[0, 2],
)
]
assert_documents_equal(expected_0, results_0, ignoring=LENGTHS)
results_1 = list(jsonql.read_jsons(res / "part_1.json"))
expected_1 = [
dict(
text=text("Good morning", "I'm originaler"),
original_nlines=3,
nlines=2,
line_ids=[0, 2],
)
]
assert_documents_equal(expected_1, results_1, ignoring=LENGTHS)
words = [w for part in [part_0, part_1] for doc in part for w in doc]
expected = {str_hash(s.lower()): s.startswith("_") for s in words}
assert expected == load_hashes(h)
def test_remove_duplicates_sharded(tmp_path: Path):
data = tmp_path / "data"
part_0 = [["Hello", "_World", "I'm so original"]]
write_docs(data / "part_0.json", part_0)
part_1 = [["_Good morning", "_World", "I'm originaler"]]
write_docs(data / "part_1.json", part_1)
h = tmp_path / "hashes"
h.mkdir()
h0 = FlatHashSet()
h0.add([str_hash(s.lower()) for doc in part_0 for s in doc])
h0.add([str_hash("_world")])
h0.dump(h / "part_0.bin")
assert {
str_hash("hello"): False,
str_hash("_world"): True,
str_hash("i'm so original"): False,
} == as_dict(h0)
h1 = FlatHashSet()
h1.add([str_hash(s.lower()) for doc in part_1 for s in doc])
h1.add([str_hash("_good morning")])
h1.dump(h / "part_1.bin")
assert {
str_hash("_good morning"): True,
str_hash("_world"): False,
str_hash("i'm originaler"): False,
} == as_dict(h1)
res = tmp_path / "res"
res.mkdir()
# dedup.DISABLE_MULTI_PROCESSING = True # Simplifies debugging
dedup.remove_duplicates_sharded(
files=[data / "part_0.json", data / "part_1.json"],
outputs=[res / "part_0.json", res / "part_1.json"],
field="text",
hashes_dir=h,
)
results_0 = list(jsonql.read_jsons(res / "part_0.json"))
expected_0 = [
dict(
text=text("Hello", "I'm so original"),
original_nlines=3,
nlines=2,
line_ids=[0, 2],
)
]
assert_documents_equal(expected_0, results_0, ignoring=LENGTHS)
# First pass removes "_world", second "_good morning".
results_1 = list(jsonql.read_jsons(res / "part_1.json"))
expected_1 = [
dict(text=text("I'm originaler"), original_nlines=3, nlines=1, line_ids=[2])
]
assert_documents_equal(expected_1, results_1, ignoring=LENGTHS)
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