time
模块里的
strptime()和
strftime()。
而
strftime()则根据你指定的格式控制字符串输出日期。
比如,把
“12-Jan-06
10:06”
格式转换成
“2006-01-12
10:06:00”
格式:
>>>
from
time
import
strptime,
strftime
>>>
>>>
myDate
=
'12-Jan-06
10:06'
>>>
parsed
=
strptime(
myDate,
'%d-%b-%y
%H:%M'
)
>>>
converted
=
strftime(
'%Y-%m-%d
%H:%M:00',
parsed
)
>>>
>>>
converted
'2006-01-12
10:06:00'
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。下面总结下本人想到的几个常用功能。1、当前时间:
>>>print datetime.datetime.now()2015-07-17 16:39:15.712000>>>print type(datetime.datetime.now())
<type 'datetime.datetime'>
返回的datetime时间格式。
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_mday17
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