parameters: (self, dt)
docstring: datetime -> DST offset as timedelta, positive for east of UTC.
  
          Return 0 if DST not in effect.  utcoffset() must include the DST
          offset.
docstring_summary: datetime -> DST offset as timedelta, positive for east of UTC.
docstring_tokens: datetime - > DST offset as timedelta positive for east of UTC .
function: def dst(self, dt):
          """datetime -> DST offset as timedelta, positive for east of UTC.
  
          Return 0 if DST not in effect.  utcoffset() must include the DST
          offset.
          """
          raise NotImplementedError("tzinfo subclass must override dst()")
function_tokens: def dst ( self , dt ) : raise NotImplementedError ( "tzinfo subclass must override dst()" )