code: def exclude_time(self, start, end, days):
          
          self._excluded_times.append(TimeRange(start, end, days))
          return self
docs: Added an excluded time by start, end times and the days.
  
          ``start`` and ``end`` are in military integer times (e.g. - 1200 1430).
          ``days`` is a collection of integers or strings of fully-spelt, lowercased days
                   of the week.