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""" |
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2
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PRIVATE MODULE: do not import (from) it directly. |
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3
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4
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This module contains functionality for supporting the compatibility of jsons |
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with multiple Python versions. |
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""" |
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from enum import Enum |
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8
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9
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10
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class Flag(Enum): |
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""" |
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This is a light version of the Flag enum type that was introduced in |
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Python3.6. It supports the use of pipes for members (Flag.A | Flag.B). |
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""" |
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@classmethod |
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def _get_inst(cls, value): |
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try: |
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result = cls(value) |
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except ValueError: |
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pseudo_member = object.__new__(cls) |
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pseudo_member._value_ = value |
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contained = [elem.name for elem in cls if elem in pseudo_member] |
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pseudo_member._name_ = '|'.join(contained) |
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result = pseudo_member |
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return result |
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def __or__(self, other: 'Flag') -> 'Flag': |
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new_value = other.value | self.value |
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return self._get_inst(new_value) |
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32
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def __contains__(self, item: 'Flag') -> bool: |
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return item.value == self.value & item.value |
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35
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__ror__ = __or__ |
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38
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def tuple_with_ellipsis(tup: type) -> bool: |
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39
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# Python3.5: Tuples have __tuple_use_ellipsis__ |
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# Python3.7: Tuples have __args__ |
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use_el = getattr(tup, '__tuple_use_ellipsis__', None) |
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42
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if use_el is None: |
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use_el = tup.__args__[-1] is ... |
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return use_el |
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46
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47
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def get_union_params(un: type) -> list: |
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48
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# Python3.5: Unions have __union_params__ |
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49
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# Python3.7: Unions have __args__ |
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50
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return getattr(un, '__union_params__', getattr(un, '__args__', None)) |
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ramonhagenaars /
jsons
