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from datetime import datetime
from decimal import Decimal
from typing import Any, Callable, Mapping, Optional, Type, Union
from typepy import (
Bool,
DateTime,
Dictionary,
Infinity,
Integer,
IpAddress,
List,
Nan,
NoneType,
NullString,
RealNumber,
String,
Typecode,
)
from typepy.type import AbstractType
TypeHint = Optional[Type[AbstractType]]
TransFunc = Callable[[Any], Any]
DateTimeFormatter = Callable[[datetime], str]
FloatType = Union[Type[Decimal], Type[float]]
StrictLevelMap = Mapping[Union[str, Typecode], int]
TypeValueMap = Mapping[Typecode, Union[float, Decimal, None]]
_type_hint_map = {
# high frequently used types
"int": Integer,
"float": RealNumber,
"realnumber": RealNumber,
"str": String,
# low frequently used types
"bool": Bool,
"datetime": DateTime,
"dict": Dictionary,
"inf": Infinity,
"ip": IpAddress,
"list": List,
"nan": Nan,
"none": NoneType,
"nullstr": NullString,
}
def normalize_type_hint(type_hint: Union[str, TypeHint]) -> TypeHint:
if not type_hint:
return None
if not isinstance(type_hint, str):
return type_hint
type_hint = type_hint.strip().casefold()
for key, value in _type_hint_map.items():
if type_hint.startswith(key):
return value
raise ValueError(f"unknown typehint: {type_hint}")
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