def dst(self, dt):
tt = _localtime(_mktime((dt.year, dt.month, dt.day,<EOL>dt.hour, dt.minute, dt.second, dt.weekday(), <NUM_LIT:0>, -<NUM_LIT:1>)))<EOL>if tt.tm_isdst > <NUM_LIT:0>: return _dstdiff<EOL>return _zero<EOL>
datetime -> DST offset in minutes east of UTC.