code: def get_filename(self, failobj=None):
          
          missing = object()
          filename = self.get_param('filename', missing, 'content-disposition')
          if filename is missing:
              filename = self.get_param('name', missing, 'content-type')
          if filename is missing:
              return failobj
          return utils.collapse_rfc2231_value(filename).strip()
docs: Return the filename associated with the payload if present.
  
          The filename is extracted from the Content-Disposition header's
          `filename' parameter, and it is unquoted.  If that header is missing
          the `filename' parameter, this method falls back to looking for the
          `name' parameter.