elein@varlena.com (elein) writes:
> createlang -U postgres 'plpythonu' template1
> createlang: language installation failed: ERROR: could not load
> library "/usr/local/pgsql74/lib/plpython.so":
> /usr/local/pgsql74/lib/plpython.so: undefined symbol: PyDict_Copy
I'd bet on a python version issue, viz plpython expecting a newer
version of python than you have installed.
regards, tom lane