title: In Django Combobox choices, how do you lookup description from short value?
body: <p>In Django models/forms the choices for a combobox often look like this:</p>
  
  <pre>
  food_choices = (("",""), ("1", "Falafel"), ("2", "Hummus"), ("3", "Eggplant Stuff, Babaganoush???"), 
  </pre>
  
  <p>So the value to be stored in the database will be 1/2/3, but the displayed value on the form will be the long description.  When we are working in code outside a form, how can we quickly lookup the long description given the short value stored in the model?</p>
  
  <p>So I want to map short values to long values:</p>
  
  <pre>
  >>print foo("1")
    "Falafel"
  </pre>