python中datetime的常用功能

datetime在python中比较常用，主要用来处理时间日期，使用前先倒入datetime模块，下面总结一下本人用到的常用功能。

1.当前时间

In [30]: datetime.datetime.now()
Out[30]: datetime.datetime(2018, 9, 11, 10, 40, 30, 190295)

2、当前日期

>>> print datetime.datetime.now().date()
2015-07-17
>>> print type(datetime.datetime.now().date())
<type 'datetime.date'>

3、当前时间tuple

>>> datetime.datetime.now().timetuple()
time.struct_time(tm_year=2015, tm_mon=7, tm_mday=17, tm_hour=16, tm_min=51, tm_sec=26, tm_wday=4, tm_yday=198, tm_isdst=-1) >>> datetime.datetime.now().timetuple().tm_mday 17

4、时间移动（几天、几小时前后...）

使用datetime.timedelta这个方法来前后移动时间，可以用的参数有weeks，days，hours，minutes，seconds，microseconds。

>>> print datetime.datetime.now() + datetime.timedelta(days=1) 2015-07-18 16:49:48.574000 >>> print datetime.datetime.now() + datetime.timedelta(hours=1) 2015-07-17 17:49:57.122000 >>> print datetime.datetime.now() + datetime.timedelta(minutes=-30) 2015-07-17 16:20:08.619000

上个月最后一天

>>> print datetime. date(day=1,month=datetime.date.today().month,year=datetime.date.today().year) - datetime.timedelta(days=1)
2015-06-30

5、获取两个时间的时间差

>>> ( datetime.datetime.now() - datetime.datetime.utcnow()).total_seconds()
28800 .0

6、时间转化

datetime转str格式：

>>> datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
'2015-07-17 16:58:46'

str格式转datetime格式：

>>> datetime.datetime.strptime("2015-07-17 16:58:46","%Y-%m-%d %H:%M:%S")
datetime.datetime(2015, 7, 17, 16, 58, 46) >>> print datetime.datetime.strptime("2015-07-17 16:58:46","%Y-%m-%d %H:%M:%S") 2015-07-17 16:58:46 >>> print type(datetime.datetime.strptime("2015-07-17 16:58:46","%Y-%m-%d %H:%M:%S")) <type 'datetime.datetime'>

datetime转timestamp：

>>> import time
>>> now=datetime.datetime.now()
>>> time.mktime(now.timetuple())
1437123812.0

timestamp转datetime:

>>> datetime.datetime.fromtimestamp(1437123812.0)
datetime.datetime(2015, 7, 17, 17, 3, 32)
>>> print datetime.datetime.fromtimestamp(1437123812.0)
2015 -07-17 17:03:32   原文地址：https://blog.csdn.net/mrqingyu/article/details/54968720