35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
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"""Split namespace for argparse to allow separating options by prefix.
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We use this to direct some options to an Options object and some to a
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regular namespace.
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"""
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# In its own file largely because mypyc doesn't support its use of
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# __getattr__/__setattr__ and has some issues with __dict__
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import argparse
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from typing import Tuple, Any
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class SplitNamespace(argparse.Namespace):
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def __init__(self, standard_namespace: object, alt_namespace: object, alt_prefix: str) -> None:
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self.__dict__['_standard_namespace'] = standard_namespace
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self.__dict__['_alt_namespace'] = alt_namespace
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self.__dict__['_alt_prefix'] = alt_prefix
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def _get(self) -> Tuple[Any, Any]:
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return (self._standard_namespace, self._alt_namespace)
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def __setattr__(self, name: str, value: Any) -> None:
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if name.startswith(self._alt_prefix):
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setattr(self._alt_namespace, name[len(self._alt_prefix):], value)
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else:
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setattr(self._standard_namespace, name, value)
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def __getattr__(self, name: str) -> Any:
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if name.startswith(self._alt_prefix):
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return getattr(self._alt_namespace, name[len(self._alt_prefix):])
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else:
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return getattr(self._standard_namespace, name)
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