def get_timedelta_conversion_factor(src_unit, dest_unit):
 return _get_conversion_multiplier(DATETIME_UNITS[src_unit], DATETIME_UNITS[dest_unit])

def get_timedelta_conversion_factor ( src_unit , dest_unit ) : return _get_conversion_multiplier ( DATETIME_UNITS [ src_unit ] , DATETIME_UNITS [ dest_unit ] )
return an integer multiplier allowing to convert from timedeltas of *src_unit* to *dest_unit* .