python獲取上周的起始日期

import datetime


def get_date_of_last_week():
    """
    獲取上周開始結束日期
    :return: str，date tuple
    """
    today = datetime.date.today()
    begin_of_last_week = (today - datetime.timedelta(days=today.isoweekday() + 7)).strftime('%Y-%m-%d')
    end_of_last_week = (today - datetime.timedelta(days=today.isoweekday() + 1)).strftime('%Y-%m-%d')
    return begin_of_last_week, end_of_last_week