Simon Wittber <simonwittber@gmail.com> writes:
> I've now installed 7.4 on our debian server, but it appears not to
> come with plpython installed.
Should be there, though you may need an auxiliary package. I'm not
sure how Debian splits things up, but in RPM-based distributions it's
in a postgresql-python package.
A couple things to check:
1. It's "plpythonu", not "plpython".
2. Did you do a createlang operation?
regards, tom lane