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82 lines
2.0 KiB
Python
82 lines
2.0 KiB
Python
5 years ago
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from __future__ import absolute_import, unicode_literals
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import logging
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import os
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class TypeData(object):
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def __init__(self, default_type, as_type):
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self.default_type = default_type
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self.as_type = as_type
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def __repr__(self):
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return "{}(base={}, as={})".format(self.__class__.__name__, self.default_type, self.as_type)
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def convert(self, value):
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return self.default_type(value)
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class BoolType(TypeData):
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BOOLEAN_STATES = {
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"1": True,
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"yes": True,
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"true": True,
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"on": True,
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"0": False,
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"no": False,
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"false": False,
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"off": False,
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}
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def convert(self, value):
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if value.lower() not in self.BOOLEAN_STATES:
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raise ValueError("Not a boolean: %s" % value)
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return self.BOOLEAN_STATES[value.lower()]
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class NoneType(TypeData):
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def convert(self, value):
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if not value:
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return None
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return str(value)
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class ListType(TypeData):
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def _validate(self):
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""""""
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def convert(self, value, flatten=True):
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if isinstance(value, (str, bytes)):
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value = filter(None, [x.strip() for x in value.splitlines()])
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values = list(value)
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result = []
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for value in values:
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sub_values = value.split(os.pathsep)
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result.extend(sub_values)
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converted = [self.as_type(i) for i in result]
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return converted
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def convert(value, as_type, source):
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"""Convert the value as a given type where the value comes from the given source"""
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try:
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return as_type.convert(value)
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except Exception as exception:
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logging.warning("%s failed to convert %r as %r because %r", source, value, as_type, exception)
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raise
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_CONVERT = {bool: BoolType, type(None): NoneType, list: ListType}
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def get_type(action):
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default_type = type(action.default)
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as_type = default_type if action.type is None else action.type
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return _CONVERT.get(default_type, TypeData)(default_type, as_type)
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__all__ = (
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"convert",
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"get_type",
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)
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