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Psycopg website

Python import error

Reported by Psycopg website | February 21st, 2011 @ 11:24 AM

Submitted by: Giuseppe Tofoni

Good Morning

I have the following problem with psycopg2-2.3.2:

python 2.6.4 (r264:75706, Dec 5 2009, 21:18:28)
[GCC 4.3.3] on linux2 Type "help", "copyright", "credits" or "license" for more information.

import psycopg2 Traceback (most recent call last):
File "", line 1, in File "/usr/lib/python2.6/site-packages/psycopg2/", line 69, in


ImportError: cannot open shared object file: No such file or directory

My dir postgresql (vers. 9.0.3)

My setup.cfg

there were no errors in installation.

I linked /usr/local/pgsql/ in /usr/lib and everything is fine.

Is that correct?

Thanks for you help and advice.

Comments and changes to this ticket

  • Daniele Varrazzo

    Daniele Varrazzo February 21st, 2011 @ 11:41 AM

    The buildbot tests the lib the same way (postgres compiled in /usr/local/somewhere) so I expect it to work.

    Please try with a "make clean", "make" in the psycopg dir. Take a look if the compiler log shows the expected path (e.g. -I/usr/local/pgsql/include/ instead of /usr/include). Also take a look if ldd psycopg2/ links to the correct lib.

    What is the output of "pg_config --libdir --includedir" using your pg_config?

  • Daniele Varrazzo

    Daniele Varrazzo February 21st, 2011 @ 12:03 PM

    • State changed from “new” to “invalid”

    You should probably add your non-standard library to the LD_LIBRARY_PATH to allow the linker to find it:

    $ ldd /home/piro/src/psycopg2/build/lib.2.6/psycopg2/ | grep libpq
   => not found
    $ LD_LIBRARY_PATH=/usr/local/pgsql/lib ldd /home/piro/src/psycopg2/build/lib.2.6/psycopg2/ | grep libpq
   => /usr/local/pgsql/lib/ (0x00007f1fac1b1000)

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Psycopg is the most used PostgreSQL adapter for the Python programming language. At the core it fully implements the Python DB API 2.0 specifications. Several extensions allow access to many of the features offered by PostgreSQL.

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