python-psycopg2 from home:Aareon-Deutschland:PostgreSQL project
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Add repository and install manually
For SLES 12.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Aareon-Deutschland:PostgreSQL/SLES_12.5/home:Aareon-Deutschland:PostgreSQL.repo zypper refresh zypper install python-psycopg2