title: Django Management Command argument obtained from execution of another program
body: <p>I need to run a Custom Django Management Command (module named populate_db.py) included in a management/commands directory. It populates a database. </p>
  
  <pre><code>restaurant/
      __init__.py
      models.py
      management/
          commands/
              _private.py
              populate_db.py
      tests.py
      views.py
      formDict.py
  </code></pre>
  
  <p>I want the command to take a mandatory argument as a dictionary. The mentioned dictionary can be obtained from the execution of another program named formDict.py </p>
  
  <p>So I want a one-line command which will run formDict.py and consecutively take its result as an argument for my Custom Django Management Command <code>python manage.py populate_db</code>.</p>
  
  <p>Is it possible to form such a command at all? If not, how to implement the idea alternatively?</p>