本文实例讲述了Python实现计算两个时间之间相差天数的方法。分享给大家供大家参考，具体如下：

#-*- encoding:UTF-8 -*-

from datetime import date

import time

nowtime = date.today()

def convertstringtodate(stringtime):

"把字符串类型转换为date类型"

if stringtime[0:2] == "20":

year=stringtime[0:4]

month=stringtime[4:6]

day=stringtime[6:8]

begintime=date(int(year),int(month),int(day))

return begintime

else :

year="20"+stringtime[0:2]

month=stringtime[2:4]

day=stringtime[4:6]

begintime=date(int(year),int(month),int(day))

return begintime

def comparetime(nowtime,stringtime):

"比较两个时间,并返回两个日期之间相差的天数"

if isinstance(nowtime,date):

pass

else:

nowtime=convertstringtodate(nowtime)

if isinstance(stringtime,date):

pass

else:

stringtime=convertstringtodate(stringtime)

result=nowtime-stringtime

return result.days

"""

if stringtime[0:2] == "20":

year=stringtime[0:4]

month=stringtime[4:6]

day=stringtime[6:8]

begintime=date(int(year),int(month),int(day))

endtime=nowtime

result=endtime-begintime

return result.days

else :

year="20"+stringtime[0:2]

month=stringtime[2:4]

day=stringtime[4:6]

begintime=date(int(year),int(month),int(day))

endtime=nowtime

result=endtime-begintime

return result.days

"""

print isinstance("20141012",date)

print comparetime(nowtime,"140619")

PS：这里再为大家推荐几款关于日期与天数计算的在线工具供大家使用：

希望本文所述对大家Python程序设计有所帮助。