airflow/typing_compat.py

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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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"""This module provides helper code to make type annotation within Airflow codebase easier."""
from __future__ import annotations

__all__ = [
    "Literal",
    "ParamSpec",
    "Protocol",
    "TypedDict",
    "TypeGuard",
    "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, TypeGuard
else:
    from typing_extensions import ParamSpec, TypeGuard