time 模块

import time

print(dir(time))
print(time.__doc__)

[‘_STRUCT_TM_ITEMS‘, ‘__doc__‘, ‘__loader__‘, ‘__name__‘, ‘__package__‘, ‘__spec__‘, ‘altzone‘, ‘asctime‘, ‘clock‘, ‘ctime‘, ‘daylight‘, ‘get_clock_info‘, ‘gmtime‘, ‘localtime‘, ‘mktime‘, ‘monotonic‘, ‘perf_counter‘, ‘process_time‘, ‘sleep‘, ‘strftime‘, ‘strptime‘, ‘struct_time‘, ‘time‘, ‘timezone‘, ‘tzname‘]
This module provides various functions to manipulate time values.

There are two standard representations of time.  One is the number
of seconds since the Epoch, in UTC (a.k.a. GMT).  It may be an integer
or a floating point number (to represent fractions of seconds).
The Epoch is system-defined; on Unix, it is generally January 1st, 1970.
The actual value can be retrieved by calling gmtime(0).

The other representation is a tuple of 9 integers giving local time.
The tuple items are:
  year (including century, e.g. 1998)
  month (1-12)
  day (1-31)
  hours (0-23)
  minutes (0-59)
  seconds (0-59)
  weekday (0-6, Monday is 0)
  Julian day (day in the year, 1-366)
  DST (Daylight Savings Time) flag (-1, 0 or 1)
If the DST flag is 0, the time is given in the regular time zone;
if it is 1, the time is given in the DST time zone;
if it is -1, mktime() should guess based on the date and time.

Variables:

timezone -- difference in seconds between UTC and local standard time #UTC与本地标准时间之间的秒差
altzone -- difference in  seconds between UTC and local DST time      #UTC与本地DST时间之间的秒差
daylight -- whether local time should reflect DST                     #当地时间是否应反映DST
tzname -- tuple of (standard time zone name, DST time zone name)      #（标准时区名称，DST时区名称）元组

Functions:

time() -- return current time in seconds since the Epoch as a float #返回当前时间（以秒为计算单位），是一个浮点数
clock() -- return CPU time since process start as a float           #从进程开始返回CPU时间，是一个浮点数
sleep() -- delay for a number of seconds given as a float           #延迟一段给定时间，返回None
gmtime() -- convert seconds since Epoch to UTC tuple　　　　　　　　　 #从历元到UTC元组转换秒数
localtime() -- convert seconds since Epoch to local time tuple
asctime() -- convert time tuple to string                           #将时间元组转换为字符串
ctime() -- convert time in seconds to string                        #将秒数转换为字符串
mktime() -- convert local time tuple to seconds since Epoch         #将局部时间元组转换为秒
strftime() -- convert time tuple to string according to format specification #根据格式规范将时间元组转换为字符串
strptime() -- parse string to time tuple according to format specification #根据格式规范解析字符串到时间元组
tzset() -- change the local timezone                                #更改本地时区

 1 #!/usr/bin/python3
 2 # -*- coding:utf-8 -*-
 3 #__author:Administrator
 4 #date:2018/6/24
 5 import time
 6 
 7 # 生成时间戳
 8 print(‘1‘,‘>>>‘,time.time())
 9 #将元组时间转化为时间戳
10 print(‘1‘,‘>>>‘,time.mktime(time.localtime()))
11 print(‘1‘,‘>>>‘,time.mktime(time.gmtime()))
12 
13 print(‘2‘,‘>>>‘,time.clock())
14 #等待时间，无返回
15 print(‘3‘,‘>>>‘,time.sleep(2))
16 
17 #时间戳转化为时间元组 格林威治时间
18 time1=time.time()
19 print(‘4‘,‘>>>‘,time.gmtime()) #返回格林威治时间
20 print(‘4‘,‘>>>‘,time.gmtime(time1))# 默认获取当前时间
21 # 时间戳转化为时间元组 本地时间
22 print(‘5‘,‘>>>‘,time.localtime(time1))
23 print(‘5‘,‘>>>‘,time.localtime())# 默认获取当前时间戳
24 #格式化时间转化为时间元组
25 print(‘6‘,‘>>>‘,time.strptime(‘2018-06-24 11:50:00‘,‘%Y-%m-%d %X‘))
26 print(‘6‘,‘>>>‘,time.strptime(‘2018-06-24‘,‘%Y-%m-%d‘))
27 #生成格式化时间
28 print(‘7‘,‘>>>‘,time.strftime(‘%Y-%m-%d %X‘))
29 #元组时间转化为格式化时间
30 print(‘7‘,‘>>>‘,time.strftime(‘%Y-%m-%d %X‘,time.localtime())) # 本地时间
31 print(‘7‘,‘>>>‘,time.strftime(‘%Y-%m-%d‘,time.localtime())) # 本地时间
32 print(‘7‘,‘>>>‘,time.strftime(‘%X‘,time.localtime())) # 本地时间
33 print(‘7‘,‘>>>‘,time.strftime(‘%m-%d %X‘,time.localtime())) # 本地时间
34 print(‘7‘,‘>>>‘,time.strftime(‘%Y-%m-%d %X‘,time.gmtime()))# 格林威治时间
35 
36 
37 #生成固定格式的时间表示格式
38 #将时间元组转化为格式化时间
39 print(‘8‘,‘>>>‘,time.asctime())
40 print(‘8‘,‘>>>‘,time.asctime(time.localtime()))
41 print(‘8‘,‘>>>‘,time.asctime(time.gmtime()))
42 #将时间戳转化为格式化时间
43 print(‘9‘,‘>>>‘,time.ctime())#将秒数转换为字符串
44 print(‘9‘,‘>>>‘,time.ctime(time.time()))#将秒数转换为字符串

D:\Programs\Python36\python.exe F:/python全栈开发（从入门到放弃）/time_text.py
1 >>> 1529813858.3810995
1 >>> 1529813858.0
1 >>> 1529785058.0
2 >>> 0.0
3 >>> None
4 >>> time.struct_time(tm_year=2018, tm_mon=6, tm_mday=24, tm_hour=4, tm_min=17, tm_sec=40, tm_wday=6, tm_yday=175, tm_isdst=0)
4 >>> time.struct_time(tm_year=2018, tm_mon=6, tm_mday=24, tm_hour=4, tm_min=17, tm_sec=40, tm_wday=6, tm_yday=175, tm_isdst=0)
5 >>> time.struct_time(tm_year=2018, tm_mon=6, tm_mday=24, tm_hour=12, tm_min=17, tm_sec=40, tm_wday=6, tm_yday=175, tm_isdst=0)
5 >>> time.struct_time(tm_year=2018, tm_mon=6, tm_mday=24, tm_hour=12, tm_min=17, tm_sec=40, tm_wday=6, tm_yday=175, tm_isdst=0)
6 >>> time.struct_time(tm_year=2018, tm_mon=6, tm_mday=24, tm_hour=11, tm_min=50, tm_sec=0, tm_wday=6, tm_yday=175, tm_isdst=-1)
6 >>> time.struct_time(tm_year=2018, tm_mon=6, tm_mday=24, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=6, tm_yday=175, tm_isdst=-1)
7 >>> 2018-06-24 12:17:40
7 >>> 2018-06-24 12:17:40
7 >>> 2018-06-24
7 >>> 12:17:40
7 >>> 06-24 12:17:40
7 >>> 2018-06-24 04:17:40
8 >>> Sun Jun 24 12:17:40 2018
8 >>> Sun Jun 24 12:17:40 2018
8 >>> Sun Jun 24 04:17:40 2018
9 >>> Sun Jun 24 12:17:40 2018
9 >>> Sun Jun 24 12:17:40 2018

Process finished with exit code 0

属性                            值
tm_year（年）                  比如2011 
tm_mon（月）                   1 - 12
tm_mday（日）                  1 - 31
tm_hour（时）                  0 - 23
tm_min（分）                   0 - 59
tm_sec（秒）                   0 - 61
tm_wday（weekday）             0 - 6（0表示周日）
tm_yday（一年中的第几天）        1 - 366
tm_isdst（是否是夏令时）        默认为-1

print (time.strftime("%Y-%m-%d %X"))