On 2020-10-18 06:02:00 +0800 (+0800), James wrote:
I met some problems in installing devstack
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ubuntu-18.04.5-desktop-amd64
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For latest versions of DevStack you'll want Ubuntu 20.04 instead, it's not necessarily expected to work on older Ubuntu versions unless you also use an older DevStack.
Attempting uninstall:+simplejson Found existing installation: simplejson 3.13.2 ERROR: Cannot uninstall 'simplejson'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.
[...]
The error you're seeing is because DevStack wants to install simplejson with pip, but there's a distro package of a different version of simplejson already present which it cannot remove. If you continue to see this error on Ubuntu 20.04, try using apt to uninstall the python3-simplejson package before starting DevStack.