python教程python日期函数实例

python

python中对日期进行操作的库有:datetime、time

无论在哪种语言,日期函数肯定是最常用的函数。下面直接上实例代码

#datetime

import datetime

#当前日期

now = datetime.datetime.now()

print(now.strftime("%Y-%m-%d %H:%M:%S"))

print(now.strftime("%Y-%m-%d"))

#string convert to datetime

time_str = "2013-07-29 09:05:00"

str_convert_2_time = datetime.datetime.strptime(time_str, "%Y-%m-%d %H:%M:%S")

print(str_convert_2_time)

#比较两个日期相差多少天

time_strA = "2013-07-29 09:05:00"

time_strB ="2013-08-29 09:05:00"

day = datetime.datetime.strptime(time_strA, "%Y-%m-%d %H:%M:%S")

day2 = datetime.datetime.strptime(time_strB, "%Y-%m-%d %H:%M:%S")

sub_day = day2 - day

print("{0}和{1}相差{2}天".format(time_strA, time_strB, str(sub_day.days)))

#今后的n天的日期

n_days = 4

now = datetime.datetime.now()

my_date = datetime.timedelta(days=n_days)

n_day = now + my_date

print("从今天起的{0}天的日期是:".format(n_days))

print(n_day.strftime("%Y-%m-%d %H:%M:%S"))


运行结果:

>>>

2013-07-29 09:48:16

2013-07-29

2013-07-29 09:05:00

2013-07-29 09:05:00和2013-08-29 09:05:00相差31天

从今天起的4天的日期是:

2013-08-02 09:48:16

>>>


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