今年有几个周末，编写一个 weekends_range，生成并打印一年中全部周末的日期

编写一个 weekends_range，生成并打印一年中全部周末的日期python import datetime def jishuan(year): list_year = [] numble_1 = datetime.date(year,1,1) numble_2 = numble_1 + datetime.timedelta(days=5-numble_1.week

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