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https://issues.apache.org/jira/browse/AIRFLOW-5898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17147709#comment-17147709
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ASF subversion and git services commented on AIRFLOW-5898:
----------------------------------------------------------
Commit 850fa2935434ab3f11eccb79c1af19abbb48547e in airflow's branch
refs/heads/v1-10-test from Qingping Hou
[ https://gitbox.apache.org/repos/asf?p=airflow.git;h=850fa29 ]
[AIRFLOW-5898] fix alembic crash due to typing import (#6547)
(cherry picked from commit 3a3730eaa5ff1b6ca25a510bd7fb6894f8965bc3)
> alembic command crashes due to typing import path collision
> -----------------------------------------------------------
>
> Key: AIRFLOW-5898
> URL: https://issues.apache.org/jira/browse/AIRFLOW-5898
> Project: Apache Airflow
> Issue Type: New Feature
> Components: database
> Affects Versions: 2.0.0
> Reporter: QP Hou
> Assignee: QP Hou
> Priority: Trivial
> Fix For: 2.0.0
>
>
> Running alemibc within airflow directory results in the following crash:
>
> {code:java}
> File
> "/Users/qph/Envs/airflow/lib/python3.7/site-packages/typing_extensions.py",
> line 17, in <module>
> from typing import Generic, Callable, TypeVar, Tuple
> ImportError: cannot import name 'Generic' from 'typing'
> {code}
> This is due to typing.py within airlfow directory collides with the builtin
> typing module when a command runs inside airflow directory. Renaming it to
> `custom_typing.py` fixes the issue.
>
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