title: bad interpreter: Permission denied
body: <p>I can not install psycopg2. I try to change the DB from sqlite to postgesql but get always the same error. I also tried to install it via the project interpreter instead of my terminal but get :</p>
  
  <pre><code>python setup.py build_ext --pg-config /path/to/pg_config build ...
  
  or with the pg_config option in 'setup.cfg'.
  
  If you prefer to avoid building psycopg2 from source, please install the PyPI
  'psycopg2-binary' package instead.
  
  (venv) localhost:mysite Sergio$ pip install psycopg2
  bash: /Users/Sergio/PycharmProjects/#WE_GRAPPLE/venv/bin/pip: /Users/Sergio/PycharmProjects/#WE_GRAPPLE/venv/bin/python: bad interpreter: Permission denied
  (venv) localhost:mysite Sergio$
  </code></pre>