When I deploy the devstack of rocky , which contains watcher service，I get an error when installing python-watcherclient：
++inc/python:pip_install:354 local test_req=/opt/stack/python-watcherclient/test-requirements.txt
++inc/python:pip_install:355 [[ -e /opt/stack/python-watcherclient/test-requirements.txt ]]
++inc/python:pip_install:356 install_test_reqs='-r /opt/stack/python-watcherclient/test-requirements.txt'
++inc/python:pip_install:363 sudo -H http_proxy= https_proxy= no_proxy= PIP_FIND_LINKS= SETUPTOOLS_SYS_PATH_TECHNIQUE=rewrite /usr/local/bin/pip2.7 install -c /opt/stack/requirements/upper-constraints.txt -r /opt/stack/python-watcherclient/test-requirements.txt -e /opt/stack/python-watcherclient
Ignoring Django: markers 'python_version == "3.4"' don't match your environment
Ignoring Django: markers 'python_version == "3.5"' don't match your environment
Ignoring Pygments: markers 'python_version == "3.4"' don't match your environment
Ignoring Pygments: markers 'python_version == "3.5"' don't match your environment
Ignoring SecretStorage: markers 'python_version == "3.4"' don't match your environment
Ignoring SecretStorage: markers 'python_version == "3.5"' don't match your environment
Ignoring asyncio: markers 'python_version == "3.4"' don't match your environment
Ignoring asyncio: markers 'python_version == "3.5"' don't match your environment
Ignoring cmd2: markers 'python_version == "3.4"' don't match your environment
Ignoring cmd2: markers 'python_version == "3.5"' don't match your environment
Ignoring dnspython3: markers 'python_version == "3.4"' don't match your environment
Ignoring dnspython3: markers 'python_version == "3.5"' don't match your environment
Ignoring jeepney: markers 'python_version == "3.4"' don't match your environment
Ignoring jeepney: markers 'python_version == "3.5"' don't match your environment
Ignoring mypy: markers 'python_version == "3.4"' don't match your environment
Ignoring mypy: markers 'python_version == "3.5"' don't match your environment
Ignoring typed-ast: markers 'python_version == "3.4"' don't match your environment
Ignoring typed-ast: markers 'python_version == "3.5"' don't match your environment
Obtaining file:///opt/stack/python-watcherclient
python-watcherclient requires Python '>=3.6' but the running Python is 2.7.12
Rocky release supports python 2.7
Could you check if there is 'python-requires = >=3.6' in the file python-
maybe you get the master branch.