bazarr/libs/bidict/_typing.py

35 lines
886 B
Python

# Copyright 2009-2022 Joshua Bronson. All rights reserved.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
"""Provide typing-related objects."""
import typing as t
from enum import Enum
KT = t.TypeVar('KT')
VT = t.TypeVar('VT')
IterItems = t.Iterable[t.Tuple[KT, VT]]
MapOrIterItems = t.Union[t.Mapping[KT, VT], IterItems[KT, VT]]
class MissingT(Enum):
"""Sentinel used to represent none/missing when None itself can't be used."""
MISSING = 'MISSING'
def __repr__(self) -> str:
return '<MISSING>'
MISSING = MissingT.MISSING
OKT = t.Union[KT, MissingT] #: optional key type
OVT = t.Union[VT, MissingT] #: optional value type
DT = t.TypeVar('DT') #: for default arguments
ODT = t.Union[DT, MissingT]