794 

   795 def str2set(string_field):

   796   """Clean method for cleaning comma separated string in the edit form.

   797 

   798   Obtains the comma separated string from the form and stores it as

   799   returns it as a list of strings.

   800   """

   801 

   802   def wrapper(self):

   803     """Decorator wrapper method.

   804     """

   805     cleaned_data = self.cleaned_data

   806 

   807     string_data = cleaned_data.get(string_field)

   808 

   809     list_data = []

   810     for string in string_data.split(','):

   811       string_strip = string.strip()

   812       if string_strip and string_strip not in list_data:

   813         list_data.append(string_strip)

   814 

   815     cleaned_data[string_field] = list_data

   816 

   817     return cleaned_data[string_field]

   818 

   819   return wrapper