Instalando psycopg2 usando virtualenv en Mac OSX

Intentando instalar psycopg2 para desarrollar una aplicación en Django, utilizando el entorno de Heroku me encontre con el siguiente error:

    Error: pg_config executable not found.
    Please add the directory containing pg_config to the PATH
    or specify the full executable path with the option:
        python setup.py build_ext --pg-config /path/to/pg_config build ...
    or with the pg_config option in 'setup.cfg'.
    Complete output from command python setup.py egg_info:
    running egg_info
creating pip-egg-info/psycopg2.egg-info
writing pip-egg-info/psycopg2.egg-info/PKG-INFO
writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt
writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt
writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
warning: manifest_maker: standard file '-c' not found
Error: pg_config executable not found.
Please add the directory containing pg_config to the PATH
or specify the full executable path with the option:
    python setup.py build_ext --pg-config /path/to/pg_config build ...
or with the pg_config option in 'setup.cfg'.
----------------------------------------

Cleaning up…

 El error indica que no encuentra el directorio conteniendo  el archivo pg_config.

Lo solucione agregando el PATH a mi enviroment de mi aplicacion.

export PATH=/Library/PostgreSQL/8.4/bin/:”$PATH”

Ahora probamos:

Successfully installed psycopg2

Cleaning up…

Perfecto! :D

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