incubator-airflow/airflow/typing_compat.py

33 строки
1.3 KiB
Python

#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
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"""
This module provides helper code to make type annotation within Airflow
codebase easier.
"""
try:
# Protocol and TypedDict are only added to typing module starting from
# python 3.8 we can safely remove this shim import after Airflow drops
# support for <3.8
from typing import ( # type: ignore # noqa # pylint: disable=unused-import
Protocol, TypedDict, runtime_checkable,
)
except ImportError:
from typing_extensions import Protocol, TypedDict, runtime_checkable # type: ignore # noqa