I just installed mssql-cli with pip,
pip3 install mssql-cli
Then I try to run mssql-cli and I get
$ mssql-cli
/usr/bin/python: No module named mssqlcli
I tried to fix this by submitting a patch #234 (approved but not yet committed). You'll have to edit the file ~/.local/bin/mssql-cli and replace
python -m mssqlcli.main "$@"
With this line
( command -v python3 && python3 -m mssqlcli.main "$@" ) || python -m mssqlcli.main "$@"