There appears to be a bug in the 7.x version of the openstack client that means you cannot use it to change your password. Hence the 6.6.1 version is needed at this time.
We advise using a Python virtual environment to install the tools. After setting up your system properly for virtual environments:
$ python3 -m venv venv/openstack $ source venv/openstack/bin/activate $ pip3 install python-openstackclient==6.6.1 $ pip3 install python-swiftclient
Naturally, you will need to activate the environment whenever you use these tools.