time module method:
():Get the timestamp of the current time
(): accepts a timestamp and converts it to a tuple of the current time. Passing in () as an argument by default if you don't give it a parameter
| (): | ||
| indexing | causality | hidden meaning |
| 0 | tm_year | surname Nian |
| 1 | tm_mon | moon |
| 2 | tm_mday | date |
| 3 | tm_hour | hour |
| 4 | tm_min | ingredient |
| 5 | tm_sec | unit of angle or arc equivalent one sixtieth of a degree |
| 6 | tm_wday | Day of the week |
| 7 | tm_yday | The first days of the year |
| 8 | tm_isdst | daylight saving time |
- (): the opposite of (), it converts a time tuple into a timestamp (this must be given a parameter)
- (): represents a time tuple as: "Sun Jul 28 03:35:26 2013", if you don't give it a parameter, it will pass () as a parameter.
- (): converts a timestamp to a () expression, which is passed as a parameter if no parameter is given.
- (): convert a timestamp to a time tuple in UTC+0 time zone (China should be +8 time zone, a difference of 8 hours), if you don't give any parameter, you will pass () as a parameter by default.
- (format,()): convert a time tuple to a formatted time character, if you don't give a time tuple parameter you will pass () as a parameter.
For example, the time format in the web log is ('%d/%b/%Y:%X').
Returns results:
Sun Jul 28 04:37:38 2013
format：
| causality | specification | hidden meaning | Range of values (format) |
| particular year | %y | Remove the year of the century | 00-99 |
| %Y | Complete year | ||
| %j | The first days of the year | 001-366 | |
| months | %m | months | January 12 |
| %b | Local simplification of the name of the month | Abbreviated English months | |
| %B | Name of the full local month | Full English month | |
| dates | %d | Days of the month | January 31st |
| hourly | %H | Hour of the day (24-hour day) | 00-23 |
| %l | Hour(s) (12-hour clock) | “01-12” | |
| minutes | %M | minutes | 00-59 |
| unit of angle or arc equivalent one sixtieth of a degree | %S | unit of angle or arc equivalent one sixtieth of a degree | 00-59 |
| last week | %U | Number of weeks in a year (counting from Sunday) | 00-53 |
| %W | Number of weeks in a year (counting from Monday) | ||
| %w | Days of the week | 0-6 | |
| time zones | %Z | China: should be GMT+8 (China Standard Time) | Literacy |
| (sth. or sb) else | %x | Local corresponding date | DD/MM/YYYY |
| %X | local time stamp | Hour:Minute:Second | |
| %c | Detailed date and time | Day/Month/Year Hour:minute:second | |
| %% | '%' character | '%' character | |
| %p | The local am or pm equivalent | AM or PM |
(stringtime,format): converts a time string into an array of times according to the specified formatters.
Example:
('28/Jul/2013:04:33:29', '%d/%b/%Y:%X')
Returns results:
Copy Code The code is as follows.
time.struct_time(tm_year=2013, tm_mon=7, tm_mday=28, tm_hour=4, tm_min=33, tm_sec=29, tm_wday=6, tm_yday=209, tm_isdst=-1)
(): return to the processor clock time, generally used for performance testing and benchmarking, etc., because they reflect the actual time used by the program, usually do not use this.
():Delay running for the specified time in seconds.
import time
print () # Print timestamps
print ()# Print local time tuple
print ()# Promise a time tuple in the UTC+0 time zone.
print ()#Print asctime formatted time
print (())# Convert time tuples to timestamps
print ()# Print formatting time
print ('%d/%b/%Y:%X')# Print the time format in the specified format
# Translate a time string and its format into a time tuple
print ('28/Jul/2013:04:33:29', '%d/%b/%Y:%X')
print '%0.5f'%() # Print processor time
for i in range(100000):
pass
print '%0.5f'%()# Print processor time
Take a look at the results:
[root@localhost ~]# python
1364028568.55 time.struct_time(tm_year=2013, tm_mon=3, tm_mday=23, tm_hour=4, tm_min=49, tm_sec=28, tm_wday=5, tm_yday=82, tm_isdst=1) time.struct_time(tm_year=2013, tm_mon=3, tm_mday=23, tm_hour=8, tm_min=49, tm_sec=28, tm_wday=5, tm_yday=82, tm_isdst=0) Sat Mar 23 04:49:28 2013 1364028568.0 Sat Mar 23 04:49:28 2013 23/Mar/2013:04:49:28 time.struct_time(tm_year=2013, tm_mon=7, tm_mday=28, tm_hour=4, tm_min=33, tm_sec=29, tm_wday=6, tm_yday=209, tm_isdst=-1) 0.02000 0.03000
datetime module
():Generate a time object. This time can be set by us, default are 0 (this class is only for time)
#coding:utf-8 import datetime print () t = (1, 3, 5, 25) print t print #time print # points print # seconds print # milliseconds print # End of day print # Start of the day
Execute it:
00:00:00 01:03:05.000025 23:59:59.999999 00:00:00
():Generate a date object. This date is to be set by us, (this class is only for dates)
#coding:utf-8 import datetime #Set the date t = (2013, 2, 3) # Print the sum tuple of the set date print ()# Date tuple print t print # year print #Month print #Day # Get today's date today = () print today print ()# This prints to the millisecond # Get a tuple of today's date t1 = () print t1 # Print to ctime format (() format) #'%a %b %d %H:%M:%S %Y' print () print ()
running result
time.struct_time(tm_year=2013, tm_mon=2, tm_mday=3, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=6, tm_yday=34, tm_isdst=-1) 2013-02-03 2013 2 3 2013-07-28 2013-07-28 20:13:25.942000 time.struct_time(tm_year=2013, tm_mon=7, tm_mday=28, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=6, tm_yday=209, tm_isdst=-1) Sun Feb 3 00:00:00 2013 Sun Jul 28 00:00:00 2013
(): This class is used to do arithmetic operations on time.
(date,time):This is used to combine the date and time of the
#coding:utf-8 import datetime #Print: milliseconds to weeks representation = convert to seconds (total_seconds()) for i in [(milliseconds=1), #1 millisecond (seconds=1), #1 second (minutes=1), #1 minute (hours=1), #1 hour. (days=1), #1 day (weeks=1)]:#11 weeks #print i + '：' + i.total_seconds() print '%s = %s seconds'%(i,i.total_seconds()) print print '~' * 20 + 'I'm the dividing line' + '~' * 20 print 'Calculate the addition and subtraction of time 。。。。。。。。。' a = () print 'The time is now:' print a print 'After adding 5 hours it becomes:' b = a + (hours=5) print b print ' After adding a week it becomes: ' c = a + (weeks=1) print c print ' Minus one week becomes: ' d = a - (weeks=1) print d print 'Calculate how long the 2 times differ' print '%s minus %s'%(b, a) print 'Equals:%s'%(b - a) print '%s minus %s'%(a, d) print 'Equals:%s'%(a - d) print print '~' * 20 + 'I'm the dividing line' + '~' * 20 print 'Compare 2 times:' print 'Comparing the same day and a week ago' print a > d print 'False if compare d > a' print print '~' * 20 + 'I'm the dividing line' + '~' * 20 print 'The columns above all separate date and time, now let's combine them freely' print 'Suppose the time we want is: 2014-01-05 13:14:25' t = (13, 14, 25) d = (2014, 01, 05) print (d, t)
Print as:
0:00:00.001000 = 0.001 seconds 0:00:01 = 1.0 seconds 0:01:00 = 60.0 seconds 1:00:00 = 3600.0 seconds 1 day, 0:00:00 = 86400.0 seconds 7 days, 0:00:00 = 604800.0 seconds
Calculating addition and subtraction of time 。。。。。。。。。
The time is now： 2013-07-28 21:34:33.531000 plus5After hours it becomes： 2013-07-29 02:34:33.531000 plus一周之后变成： 2013-08-04 21:34:33.531000 One week after the loss of the： 2013-07-21 21:34:33.531000 count2What's the time difference? 2013-07-29 02:34:33.531000take2013-07-28 21:34:33.531000 be tantamount to:5:00:00 2013-07-28 21:34:33.531000take2013-07-21 21:34:33.531000 be tantamount to:7 days, 0:00:00 comparisons2time： comparisons当天和一周前的 True 如果comparisonsd > a and then returnsFalse The columns above all separate the date from the time，Now let's combine them freely. Suppose the time we want is：2014-01-05 13：14：25 2014-01-05 13:14:25