def _clear_pattern(self):
<EOL>self.__interval = None<EOL>self.__days_of_week = set()<EOL>self.__first_day_of_week = None<EOL>self.__day_of_month = None<EOL>self.__month = None<EOL>self.__index = '<STR_LIT>'<EOL>self.__start_date = None<EOL>self.__end_date = None<EOL>self.__occurrences = None<EOL>
Clears this event recurrence