docs: def process_formdata(self, valuelist):
          """Join time string."""
          if valuelist:
              time_str = u' '.join(valuelist)
              try:
                  timetuple = time.strptime(time_str, self.format)
                  self.data = datetime.time(*timetuple[3:6])
              except ValueError:
                  self.data = None
                  raise