Python里面用来管理时间的模块有2个，分别是time模块和datetime模块，现在看看如何使用
首先看看time模块
例1
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import
time
print
(time.time())
#时间戳，1970年到现在的秒数
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1474347039.991068
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例2
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print
(time.ctime())
#当前系统时间字符串格式
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Tue Sep
20
14
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50
:
39
2016
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例3
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print
(time.ctime(time.time()
-
86400
))
#根据时间戳算时间
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Mon Sep
19
14
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50
:
39
2016
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例4
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#显示的是格林威治时间
print
(time.gmtime())
time_obj
=
time.gmtime()
print
(time_obj.tm_year,time_obj.tm_mon)
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time.struct_time(tm_year
=
2016
, tm_mon
=
9
, tm_mday
=
20
, tm_hour
=
4
, tm_min
=
50
, tm_sec
=
39
, tm_wday
=
1
, tm_yday
=
264
, tm_isdst
=
0
)
2016
9
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例5
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#显示本地时间
print
(time.localtime())
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time.struct_time(tm_year
=
2016
, tm_mon
=
9
, tm_mday
=
20
, tm_hour
=
14
, tm_min
=
50
, tm_sec
=
39
, tm_wday
=
1
, tm_yday
=
264
, tm_isdst
=
0
)
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例6
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#必须传入一个时间对象的参数，把structure time转换成时间戳
print
(time.mktime(time_obj))
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1474311039.0
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例7
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#延时多少秒
time.sleep(
4
)
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例8
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#把时间对象转成字符串格式
print
(time.strftime(
"%Y-%m-%d %H:%M:%S"
,time_obj))
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2016
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09
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04
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50
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39
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例9
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#把字符串格式转换为时间对象
tm
=
time.strptime(
"2016-05-10 15:04:20"
,
"%Y-%m-%d %H:%M:%S"
)
print
(tm)
print
(time.mktime(tm))
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time.struct_time(tm_year
=
2016
, tm_mon
=
5
, tm_mday
=
10
, tm_hour
=
15
, tm_min
=
4
, tm_sec
=
20
, tm_wday
=
1
, tm_yday
=
131
, tm_isdst
=
-
1
)
1462856660.0
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接下来看看datetime模块
例1
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import
datetime
print
(datetime.date.today())
#输出当前日期
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例2
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currenttime
=
datetime.datetime.now()
#输出当前时间，最常用
print
(currenttime)
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2016
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09
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20
14
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50
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44.018886
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例3
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#比当前时间加10天
new_date
=
datetime.date.today()
+
datetime.timedelta(days
=
10
)
print
(new_date)
2016
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09
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30
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例4
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#比当前时间少1个小时
new_date
=
datetime.datetime.now()
+
datetime.timedelta(hours
=
-
1
)
print
(new_date)
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2016
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09
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13
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50
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44.018923
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例5
#直接替换
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print
(currenttime.replace(
2014
,
9
,
12
))
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12
14
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44.018886
print
(currenttime.replace(year
=
2015
))
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2015
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time_obj
=
currenttime.replace(
2015
)
print
(time_obj,
type
(time_obj))
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<
class
'datetime.datetime'
>
print
(currenttime>time_obj)
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True
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本文转自 beanxyz 51CTO博客，原文链接：http://blog.51cto.com/beanxyz/1854443，如需转载请自行联系原作者
