postgresql 9.1 - Error during installation of plpythonu (postresql & linux) -


i'm trying run command createlang plpythonu dbanem have error

createlang: language installation failed: error:  not open extension control file "/usr/share/postgresql/9.1/extension/plpythonu.control"

how can install plpythonu?? (i'm starting out linux) can me??

apt-get install postgresql-plpython

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