python – 按周,日和年逐月获取

我想知道你如何通过给予日,周数和年份来获得月份.

例如,如果你有这样的东西

def getmonth(day,week,year):
    # by day,week and year calculate the month
    print (month)

getmonth(28,52,2014)
# print 12

getmonth(13,42,2014)
# print 10

getmonth(6,2,2015)
# print 1

解决方法

每
interjay’s suggestion：

import datetime as DT

def getmonth(day,year):
    for month in range(1,13):
        try:
            date = DT.datetime(year,month,day)
        except ValueError:
            continue
        iso_year,iso_weeknum,iso_weekday = date.isocalendar()
        if iso_weeknum == week:
            return date.month

print(getmonth(28,2014))
# 12

print(getmonth(13,2014))
# 10

print(getmonth(6,2015))
# 1