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Commonly useful converters.
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é Né )Ú_AnnotationExtractor)ÚNOTHINGÚ ConverterÚFactoryÚpipe)Údefault_if_noneÚoptionalr Úto_boolc óX t t « r fd}n fd}t « }|j « }|r t j
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A converter that allows an attribute to be optional. An optional attribute
|
is one which can be set to `None`.
|
|
Type annotations will be inferred from the wrapped converter's, if it has
|
any.
|
|
Args:
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converter (typing.Callable):
|
the converter that is used for non-`None` values.
|
|
.. versionadded:: 17.1.0
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c ó | y | ||« S ©N© )ÚvalÚinstÚfieldÚ converters õb H:\项ç®\archive\æµè¯ç»\èæ¬\Change_password\venv_build\Lib\site-packages\attr/converters.pyÚoptional_converterz$optional.<locals>.optional_converter& s ø Ø{ØÙ S $¨Ó.Ð .ó c ó | y | « S r r )r r s r r z$optional.<locals>.optional_converter- s ø Ø{ØÙ S>Ð !r r ÚreturnT)Ú
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)Cà × Ñ Ó"AÙÜ4:·O±OÀAÑ4FÐ×*Ñ*¨5Ñ1à × Ñ Ó BÙ Ü7=·±ÀrÑ7JÐ×*Ñ*¨8Ñ4ä)YÔ'ÜÐ+¸È$ÔOÐOà Ð r c óè t u r| d}t |« t ur| d}t |« | t |« t t « r j r d}t |« fd}|S fd}|S )aÞ
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A converter that allows to replace `None` values by *default* or the result
|
of *factory*.
|
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Args:
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default:
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Value to be used if `None` is passed. Passing an instance of
|
`attrs.Factory` is supported, however the ``takes_self`` option is
|
*not*.
|
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factory (typing.Callable):
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A callable that takes no parameters whose result is used if `None`
|
is passed.
|
|
Raises:
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TypeError: If **neither** *default* or *factory* is passed.
|
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TypeError: If **both** *default* and *factory* are passed.
|
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ValueError:
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If an instance of `attrs.Factory` is passed with
|
``takes_self=True``.
|
|
.. versionadded:: 18.2.0
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z(Must pass either `default` or `factory`.z5Must pass either `default` or `factory` but not both.z1`takes_self` is not supported by default_if_none.c ó, | | S j « S r )Úfactory©r Údefaults r Údefault_if_none_converterz2default_if_none.<locals>.default_if_none_converterl s ø ØØ
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à??Ó$Ð $r c ó | | S S r r r' s r r) z2default_if_none.<locals>.default_if_none_convertert s ø ØØ
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àNr )r Ú TypeErrorr r r Ú
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ValueError)r( r& Úmsgr) s ` r r r B s ø ð4 'ÑgoØ8ÜnÐ àgÑ 'Ð"5ØEÜnÐ àÐÜ'Ó"ä'7Ô#Ø × Ò ØECÜ S/Ð !ô %ð %Ð$ô ð %Ð$r c óv t | t « r| j « } | dv ry| dv ryd| }t |« )aÔ
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Convert "boolean" strings (for example, from environment variables) to real
|
booleans.
|
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Values mapping to `True`:
|
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- ``True``
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- ``"true"`` / ``"t"``
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- ``"yes"`` / ``"y"``
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- ``"on"``
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- ``"1"``
|
- ``1``
|
|
Values mapping to `False`:
|
|
- ``False``
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- ``"false"`` / ``"f"``
|
- ``"no"`` / ``"n"``
|
- ``"off"``
|
- ``"0"``
|
- ``0``
|
|
Raises:
|
ValueError: For any other value.
|
|
.. versionadded:: 21.3.0
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