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"""Helper functions for processing annotations.""" |
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import sys |
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import typing |
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from . import _ctor |
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from . import _nillable_write |
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_T = typing.TypeVar("_T") |
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def _all_annotations( |
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cls: typing.Type[_T] |
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) -> typing.Iterator[typing.Tuple[typing.Type[_T], str, typing.Any]]: |
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for superclass in reversed(cls.__mro__): |
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for key, value in vars(superclass).get("__annotations__", {}).items(): |
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yield (superclass, key, value) |
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def sum_args_from_annotations(cls: typing.Type[_T]) -> typing.Dict[str, typing.Tuple]: |
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"""Return the constructor data for Sum classes.""" |
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args: typing.Dict[str, typing.Tuple] = {} |
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for superclass, key, value in _all_annotations(cls): |
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_nillable_write.nillable_write( |
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args, key, _ctor.get_args(value, vars(sys.modules[superclass.__module__])) |
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) |
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return args |
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def product_args_from_annotations( |
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cls: typing.Type[_T] |
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) -> typing.Dict[str, typing.Any]: |
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"""Return the field data for Product classes.""" |
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args: typing.Dict[str, typing.Any] = {} |
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for superclass, key, value in _all_annotations(cls): |
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if value == "None" or _ctor.annotation_is_classvar( |
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value, vars(sys.modules[superclass.__module__]) |
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): |
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value = None |
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_nillable_write.nillable_write(args, key, value) |
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return args |
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mwchase /
python-structured-data
