Message-ID: <4DB9624A.1000104@compulab.co.il>
Date: Thu, 28 Apr 2011 15:49:14 +0300
From: Sim Zacks <sim@compulab.co.il>
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US;
	rv:1.9.2.15pre) Gecko/20110207 Lightning/1.0b2 Shredder/3.1.9pre
MIME-Version: 1.0
To: c k <shreeseva.learning@gmail.com>
CC: "pgsql-general@postgresql.org" <pgsql-general@postgresql.org>
Subject: Re: plpython module import errors
References: <BANLkTikG=d4n2tvVH0+aBTyHJtwC=fgFqw@mail.gmail.com>
In-Reply-To: <BANLkTikG=d4n2tvVH0+aBTyHJtwC=fgFqw@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

On 04/28/2011 02:19 PM, c k wrote:

> Hello,
> I have installed postgresql 9 on fedora 14 having python 2.7. Now
> created plpythonu language in my database and created a simple
> function to calculate sum of two variables.
> while importing math libbrary and executing the function i got the error
> PL/Python: ImportError: No module named cmath
>
> tried to search help for this error on net and tried various things
> but nothing solved this.
> What can I do to solve this error.
> I can still work from python interpreter directly.
> Thanks in advcance.
> C P Kulkarni
This can happen if you have more then one version of python on the 
server and the postgresql is using a different one then you do on the 
command line. This is becuase modules are installed per version of python.
The easiest way to check this is:

create or replace function pyver() returns text as
$$
import sys
return sys.version
$$ language 'plpythonu';

select pyver()
and see if the version it returns is the same one as when you open the 
interpreter.

Sim