python2-cryptography from devel:languages:python:backports:fixups project
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Add repository and install manually
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:backports:fixups/15.3/devel:languages:python:backports:fixups.repo zypper refresh zypper install python2-cryptography