34 lines
1.0 KiB
Python
34 lines
1.0 KiB
Python
__all__ = ['EnumAction']
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__author__ = "Jeremy Saklad"
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import argparse
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class EnumAction(argparse.Action):
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def __init__(self, **kwargs):
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# Pop off the type value
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enum = kwargs.pop('type', None)
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nargs = kwargs.get('nargs')
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# Generate choices from the Enum
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kwargs.setdefault('choices', tuple(member.name.lower() for member in enum))
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super(EnumAction, self).__init__(**kwargs)
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self._enum = enum
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self._nargs = nargs
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def __call__(self, parser, namespace, values, option_string=None):
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# Check whether this is a single value or a list of them
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if self._nargs is None or self._nargs == argparse.OPTIONAL:
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# Convert value back into an Enum
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enum = self._enum[values.upper()]
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setattr(namespace, self.dest, enum)
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else:
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# Convert values back into Enums
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enums = [self._enum[value.upper()] for value in values]
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items = getattr(namespace, self.dest, list()) + enums
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setattr(namespace, self.dest, items)
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