airflow __init__ 源码
airflow init 代码
文件路径：/airflow/decorators/init.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.
from __future__ import annotations
from typing import Any
from airflow.decorators.base import TaskDecorator
from airflow.decorators.branch_python import branch_task
from airflow.decorators.external_python import external_python_task
from airflow.decorators.python import python_task
from airflow.decorators.python_virtualenv import virtualenv_task
from airflow.decorators.short_circuit import short_circuit_task
from airflow.decorators.task_group import task_group
from airflow.models.dag import dag
from airflow.providers_manager import ProvidersManager
# Please keep this in sync with the .pyi's __all__.
__all__ = [
"TaskDecorator",
"TaskDecoratorCollection",
"dag",
"task",
"task_group",
"python_task",
"virtualenv_task",
"external_python_task",
"branch_task",
"short_circuit_task",
]
class TaskDecoratorCollection:
"""Implementation to provide the ``@task`` syntax."""
python = staticmethod(python_task)
virtualenv = staticmethod(virtualenv_task)
external_python = staticmethod(external_python_task)
branch = staticmethod(branch_task)
short_circuit = staticmethod(short_circuit_task)
__call__: Any = python # Alias '@task' to '@task.python'.
def __getattr__(self, name: str) -> TaskDecorator:
"""Dynamically get provider-registered task decorators, e.g. ``@task.docker``."""
if name.startswith("__"):
raise AttributeError(f"{type(self).__name__} has no attribute {name!r}")
decorators = ProvidersManager().taskflow_decorators
if name not in decorators:
raise AttributeError(f"task decorator {name!r} not found")
return decorators[name]
task = TaskDecoratorCollection()
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