code: def clean_file(self):
          
          data = self.cleaned_data['file']
  
          available_parsers = self.get_parsers()
  
          for parser in available_parsers:
              try:
                  return parser.parse_file(data)
              except parsers.ParserError:
                  pass
  
          raise forms.ValidationError(
              "No parser could read the file. Tried with parsers %s." %
              (", " % (force_text(p) for p in available_parsers)))
docs: Analyse the uploaded file, and return the parsed lines.
  
          Returns:
              tuple of tuples of cells content (as text).