如何計算一週中的某一天提供的日期和月份

Question

該程序嚴格設置在2014年。但是，我想知道我是否正朝着正確的方向前進。這是我到目前爲止有：

def day(d,m): # Function for determining day name for a given date. 
    """Where m is an integer from 1 through 12 expressing a month, and d is an integer from 
    1 through 31 expressing the day-part of a date in 2014.""" 

    day = ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'] 
    weekday = (d + (2.6*m - 0.2) -2*20 + 2014 + (2014//4) + (20//4)) 
    return day[weekday] 

Answer 1

如果你不能使用datetime，這應該工作：

def day(d, m): 
    day = (sum((31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31)[:m-1]) + d + 3) % 7 
#   ^             ^ ^^^^
#   '---- adding up the days in the months    |  | | | | 
#     up to but not including the current month ----'  | | | | 
#         plus the current day of the month ----' | | | 
#         and the day of the week on 12/31/2013 ----' | | 
#     modulus (%) is what's left over after integer division ----' | 
#              seven days in a week ----' 

Answer 2

Don't reinvent the wheel：

>>> import datetime 
>>> datetime.datetime(2014, 2, 16).strftime('%a') 
'Sun' 

---

Or as a number：

>>> import datetime 
>>> datetime.datetime(2014, 2, 16).weekday() 
6 

然後你就可以進入你的day列表