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39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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# All rights reserved.
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#
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# This source code is licensed under the terms described in the LICENSE file in
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# the root directory of this source tree.
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"""
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Type-safe data interchange for Python data classes.
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:see: https://github.com/hunyadi/strong_typing
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"""
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import keyword
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from .auxiliary import Alias
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from .inspection import get_annotation
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def python_field_to_json_property(python_id: str, python_type: object | None = None) -> str:
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"""
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Map a Python field identifier to a JSON property name.
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Authors may use an underscore appended at the end of a Python identifier as per PEP 8 if it clashes with a Python
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keyword: e.g. `in` would become `in_` and `from` would become `from_`. Remove these suffixes when exporting to JSON.
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Authors may supply an explicit alias with the type annotation `Alias`, e.g. `Annotated[MyType, Alias("alias")]`.
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"""
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if python_type is not None:
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alias = get_annotation(python_type, Alias)
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if alias:
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return alias.name
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if python_id.endswith("_"):
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id = python_id[:-1]
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if keyword.iskeyword(id):
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return id
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return python_id
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