potiuk edited a comment on issue #8457: Fatal on CLI invocation for python 2.7 1.10.10 URL: https://github.com/apache/airflow/issues/8457#issuecomment-616224283 Also see the information about using constraint files to install the dependencies that are guaranteed to work: https://github.com/apache/airflow/blob/v1-10-stable/CONTRIBUTING.rst#pinned-requirement-files This installation method should work: ``` pip install apache-airflow[.... Some extras here]==1.10.10 \ --constraint https://raw.githubusercontent.com/apache/airflow/1.10.10/requirements/requirements-python3.6.txt ``` This method is also used to prepare official airflow images. In those requirement files cattrs are 0.9.0 version
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