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66 lines
1.4 KiB
Python
66 lines
1.4 KiB
Python
# SPDX-License-Identifier: MIT
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"""
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Commonly useful filters for `attr.asdict`.
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"""
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from ._make import Attribute
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def _split_what(what):
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"""
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Returns a tuple of `frozenset`s of classes and attributes.
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"""
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return (
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frozenset(cls for cls in what if isinstance(cls, type)),
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frozenset(cls for cls in what if isinstance(cls, str)),
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frozenset(cls for cls in what if isinstance(cls, Attribute)),
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)
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def include(*what):
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"""
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Include *what*.
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:param what: What to include.
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:type what: `list` of classes `type`, field names `str` or
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`attrs.Attribute`\\ s
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:rtype: `callable`
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.. versionchanged:: 23.1.0 Accept strings with field names.
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"""
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cls, names, attrs = _split_what(what)
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def include_(attribute, value):
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return (
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value.__class__ in cls
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or attribute.name in names
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or attribute in attrs
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)
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return include_
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def exclude(*what):
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"""
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Exclude *what*.
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:param what: What to exclude.
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:type what: `list` of classes `type`, field names `str` or
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`attrs.Attribute`\\ s.
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:rtype: `callable`
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.. versionchanged:: 23.3.0 Accept field name string as input argument
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"""
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cls, names, attrs = _split_what(what)
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def exclude_(attribute, value):
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return not (
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value.__class__ in cls
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or attribute.name in names
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or attribute in attrs
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)
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return exclude_
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