python 100例 输入某年某月某日，判断这一天是这一年的第几天？

  year = int(input('year:')) month = int(input('month:')) day = int(input('day:'))input day_list = [0,31,59,90,120,151,182,213,243,273,304,334]error num_day = 0 if 0<month<12:     num_day = day_list[m

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