Re: Trouble installing psycopg2

On 09/27/2013 04:45 AM, Augori wrote:
> *Thanks again for the suggestions. It doesn't look to me like it's
> installed in /usr/local/lib/python2.7/site-packages. There's an egg
> directory there, but otherwise, no psycopg2. The egg directory doesn't
> mean it's installed, does it?? Here's an ls of that site-packages dir:*
>

Yes, an egg is just a zip file that at the destination may remain zipped
or be unzipped into a directory:

http://stackoverflow.com/questions/2051192/what-is-a-python-egg

>
> *If I modify my sys.path, it still doesn't import psycopg2. The python
> command runs version 2.7.5 and you can see that in evidence in the sys
> path. It is looking at a different Python 2.7 that I installed under
> opt/bin and added to the PATH variable when I was trying to set up a
> virtualenvwrapper. *

So you have two versions of Python 2.7 in play, this complicates the issue.

>

> *But I can't get psycopg2 to install to the 2.7.5 directory. Its
> site-packages is completely empty:*
>
> root(at)server [/usr/bin]# ls /opt/lib/python2.7/site-packages
> ./ ../ README

Probably because programs are being installed in the other version of
Python 2.7

>
>
> *whereas, /usr/lib64/python2.4/site-packages/ is full of stuff,
> including psycopg2. I've pasted just a small portion of the ls results
> below.*

It is the default Python and the one CentOS is using when it
installs/updates Python.

>
> *I also tried appending this path and importing. That gives a different
> error --tries to import it but fails, probably because it's inside a 2.4
> install:*
>

That is correct Python 2.7 needs a version of psycopg2 compiled for it
not 2.4.

>
> Do you have other ideas?

Clean house. Uninstall the two versions of Python 2.7 you have and start
over.

A bit of Googling found the below, it refers to CentOS 6 but is pointed
to by people as useful on CentOS 5 also.

http://toomuchdata.com/2012/06/25/how-to-install-python-2-7-3-on-centos-6-2/

--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com