python-gunicorn from openSUSE:infrastructure:dns project
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Add repository and install manually
For openSUSE Leap 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:infrastructure:dns/openSUSE_Leap_15.3/openSUSE:infrastructure:dns.repo zypper refresh zypper install python-gunicorn