python-protobuf from home:StefanBruens:3dPrinting project
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Add repository and install manually
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:StefanBruens:3dPrinting/openSUSE_Leap_42.3/home:StefanBruens:3dPrinting.repo zypper refresh zypper install python-protobuf