lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 11 (bullseye)
Release: 11
Codename: bullseye
In your readme it says to run python -m, which on debian failed see bellow, the sslyze cmd works
root@srvr:~# which python
/usr/bin/python
root@srvr:~# python -m sslyze www.yahoo.com www.google.com
/usr/bin/python: No module named sslyze
root@srvr:~# python -m sslyze
/usr/bin/python: No module named sslyze
root@srvr:~# sslyze
Command line error: No targets to scan.
Use -h for help.
In your readme it says to run python -m, which on debian failed see bellow, the sslyze cmd works