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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def __get_time_range(self, startDate, endDate):
 """Return time range """

        today = date.today()
        start_date = today - timedelta(days=today.weekday(), weeks=1)
        end_date = start_date + timedelta(days=4)

        startDate = startDate if startDate else str(start_date)
        endDate = endDate if endDate else str(end_date)
        
        return startDate, endDate