''' 判断闰年：calendar.isleap(year) 查看某年某月日历：calendar.month(year, mouth) 查看某年某月起始星期与当月天数：calendar.monthrange(year, mouth) 查看某年某月某日是星期几：calendar.weekday(year, month, day) '''
''' 判断闰年：calendar.isleap(year) 查看某年某月日历：calendar.month(year, mouth) 查看某年某月起始星期与当月天数：calendar.monthrange(year, mouth) 查看某年某月某日是星期几：calendar.weekday(year, month, day) '''