airflow typing_compat 源码
airflow typing_compat 代码
文件路径：/airflow/typing_compat.py
#
# 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
# under the License.
"""
This module provides helper code to make type annotation within Airflow
codebase easier.
"""
from __future__ import annotations
__all__ = [
"Literal",
"ParamSpec",
"Protocol",
"TypedDict",
"runtime_checkable",
]
import sys
if sys.version_info >= (3, 8):
from typing import Protocol, TypedDict, runtime_checkable
else:
from typing_extensions import Protocol, TypedDict, runtime_checkable
# Literal in 3.8 is limited to one single argument, not e.g. "Literal[1, 2]".
if sys.version_info >= (3, 9):
from typing import Literal
else:
from typing_extensions import Literal
if sys.version_info >= (3, 10):
from typing import ParamSpec
else:
from typing_extensions import ParamSpec
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