問題及答案實例四，關於日期的簡單練習
Python練習題問題如下：
簡述：要求輸入某年某月某日
提問：求判斷輸入日期是當年中的第幾天？

#!/usr/bin/python

# -*- coding: UTF-8 -*-
  
year = int(raw_input(‘year:\n‘))
month = int(raw_input(‘month:\n‘))
day = int(raw_input(‘day:\n‘))
  
months = (0,31,59,90,120,151,181,212,243,273,304,334)
if 0 < month <= 12:
    sum = months[month - 1]
 
else:
    print ‘data error‘
sum += day
 
leap = 0 #www.iplaypy.com
 
if (year % 400 == 0) or ((year % 4 == 0) and (year % 100 != 0)):
    leap = 1
if (leap == 1) and (month > 2):
    sum += 1
print ‘it is the %dth day.‘ % sum

上面是參考答案，以下我的練習，加了一些格式校驗，當然寫成類可能更好看

此題，實驗出來range（0）後 面不執行，不會拋出異常

 1 #!/usr/bin/env python
 

 2 #coding:utf8
 3 import time,datetime
 4 import os
 5 
 6 days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
 7 def ReadDate():
 8     print "Please input a date string like 20170102 or 2017-01-02"
 9     Dateis = raw_input("Date is:")
10     Dateis = Dateis.replace(‘-‘,‘‘)  #加工成20170102
11     print Dateis
 
12     return Dateis
13 
14 def Datesplite(Dateis):  #返回年月日列表
15     print Dateis
16     if len(Dateis) != 8:
17         print ‘Wrong input!‘
18     else:
19         try:
20             Year = int(Dateis[0:4])
21             Moon = int(Dateis[4:6].lstrip(‘0‘))
22             Day = int(Dateis[6:8].lstrip(‘0‘))
23         except:
24             print "Format is Wrong!"
25         return [Year,Moon,Day]
26 
27 def Datecount(list_in):
28     print list_in
29     cday = 0
30     if list_in[0] %4 == 0 and list_in[1] > 2:
31         days[1] =days[1]+1
32     for i in range(list_in[1]-1):  #當range（0）時，這個後面不執行
33         print days[i]
34         cday += days[i]
35     cday +=list_in[2]
36     print cday,‘th‘
37 
38 ‘‘‘ 一般調用順序
39 inputdate = ReadDate()
40 splipdate = Datesplite(inputdate)
41 Datecount(splipdate)
42 ‘‘‘
43 
44 Datecount(Datesplite(ReadDate()))

練習一百例之4--日期計算