1 import string,random

     2 

     3 def make_key(model_name):

     4     """ return a 10 character random key.

     5     """

     6 

     7     while True:

     8         key = ''.join([ random.choice(string.uppercase+string.digits) for i in range(10)])

     9         try:

    10             model_name.objects.get(uniq_key=key)

    11         except model_name.DoesNotExist:

    12             return key

    13