docs: def datetime_to_ms(d):
      """Convert a Python datetime object to a millisecond epoch (UTC) time value."""
      try:
          millisecond = d.microsecond // 1000
          return calendar.timegm(_add_tzone(d).utctimetuple()) * 1000 + millisecond
      except AttributeError:
          raise TypeError('expect Python datetime object, not %s' % type(d))