Airflow has a very rich command line interface that allows for
many types of operation on a DAG, starting services, and supporting
development and testing.
System Message: ERROR/3 (/home/docs/checkouts/readthedocs.org/user_builds/airflow/checkouts/1.10.8/docs/cli.rst, line 31)
Failed to import “get_parser” from “airflow.bin.cli”.
cannot import name ‘secure_filename’ from ‘werkzeug’ (/home/docs/checkouts/readthedocs.org/user_builds/airflow/envs/1.10.8/lib/python3.7/site-packages/werkzeug/__init__.py)