python datetime example

Python provides several built-in modules for manipulating date times, like Calendar,time,datetime.Time PackageThe time package is based on the C language library function (functions). Python's interpreter is usually written in C, and some Python functions directly invoke the C-language library function.Import Time Print (Time.time ()) # wall clock time, Unit:second Print (Time.clock ()) # processor cloc

Many chapters in the PythonCook book describe the use of a database or combine multiple functions to implement some complex functions. I skipped some sections on file processing in the previous section and went directly to the section on time operations. Datetime is also a brief introduction. Because there are many things that need to be used by yourself, it is most effective to check for help. Example: C

Timedatetime? One, Time moduleTime module provides functions for various operating times 123456789101112 import timeprint(‘clock():‘,time.clock()) #返回处理器时间,3.3开始已废弃print(‘process_time():‘,time.process_time()) #返回处理器时间,3.3开始已废弃print(‘time():‘,time.time()) #返回当前系统时间戳print(‘ctime():‘,time.ctime()) #输出当前系统时间print(‘ctime(time.time()-86640):‘,time.ctime(time.time()-86640)) #将时间戳转为字符串格式print(‘gmtime(time.time()-86640):‘,time.gmtime(time.time()-86640)) #将时间戳转换成struct_time格式print(‘loc

in Python, there are usually several ways to represent time: 1) timestamp 2) formatted time string 3) tuples (struct_time) a total of nine elements. because Python's time module implementation primarily calls the C library, each platform may be different. UTC (coordinated Universal time, world co-ordination) is GMT, world standard Time. In China for Utc+8. DST (daylight saving time) is daylight saving time. Timestamp (timestamp): Typically, a timestam

Import TimePrint(Time.time ())#1970 to present time, in the form of seconds#Time.sleep (1) # delay, CPU not workingPrint(Time.clock ())#Calculate CPU Execution TimePrint(Time.gmtime ())#structured time, UK world standard TimePrint(Time.localtime ())#local time#Print (Help (time.strftime))Struct_time =time.localtime ()Print(Time.strftime ('%y-%m-%d%h:%m:%s', Struct_time))#format Time#part of the time taken outPrint(Time.strptime ('2017-11-11 19:44:08','%y-%m-%d%h:%m:%s'))#turn into structured tim

There are many chapters in the Python Cook book that describe the use of a library or implement complex functions by combining multiple functions. I'm going to skip through the previous section for file processing, go directly to the section on time operations. At the same time, DateTime is also a simple introduction. Because there are a lot of things to use on their own, to check the help is most effecti

Time ModuleThe time representation in Python is: timestamp, which is the number of seconds from January 1, 1975 00:00:00 to now, the time string after formatting, and the time struct_time tuple.Elements in the Struct_time tuple mainly include tm_year (year), Tm_mon (month), Tm_mday (Day), Tm_hour (Time), Tm_min (min), tm_sec (seconds), Tm_wday (weekday0-6 (0 for Sunday)), Tm_yday (Day 1-366 of the year), TM_ISDST (Daylight saving Time)1. Time Comm

%c Local corresponding date representation and time representation %j Day of the Year (001-366) %p the equivalent of a local a.m. or p.m. %u weeks of the year (00-53) Sunday is the beginning of the week %w Week (0-6), Sunday for the beginning of the week %W Week of the Year (00-53) Monday is the beginning of the week %x Local corresponding date representation %x Local corresponding time representation %Z the name of the current time zone Percent% of the n

In the development of unavoidable time-type conversion between the recent discovery front-end JS and back-end Django often use this conversion, where Jsdate.now () accurate to milliseconds, while Python Datetime.datetime.now () is accurate to microseconds.1. String date time conversion to timestamp# ' 2015-08-28 16:43:37.283 '-and 1440751417.283# or ' 2015-08-28 16:43:37 '-1440751417.0def string2timestamp ( strvalue): try: d = dateti

Pythondatetime module format time with Strftime? Python Three great artifacts this is the last article #!usr/bin/pythonimportdatetimedatetime.datetime.now() This will return to microsecond. So this is what we don't need. So we have to make a change. datetime.datetime.now().strftime("%Y-%m-%d%H:%M:%S") After formatting, we have a common format.Attached: strftime p

)) MyTime:1997-11-03 13:13:13#converts the specified time to a timestamp>>>Print('Mystamp:', DateTime (1997, one, 3, in.). Timestamp ())#the timestamp () function is called heremystamp:878533993.0#Convert a timestamp to a time>>>Print('MyTime:', Datetime.fromtimestamp (878533993.0)) MyTime:1997-11-03 13:13:13#strptime (date_string, format) is used to format the string, and the time module uses the same#strftime (self,format) output format subject to c

The examples in this article describe how Python calculates various time intervals using a datetime module. Share to everyone for your reference. The specific analysis is as follows: Python through the datetime module can be very convenient to calculate the difference of two times,

1, Time module: times, DateTime;1), Timestamp (SEC) 1970 00:00:00 defined as 0;time.time ()2), formatted time string3), tuple (struct_time) 9 elements: Year, month, day, time, minute,seconds, weeks, the day of the year 0-6, tm_isdst=0;access Method: Time.localtime ()convert each other:Timestamp ----> Tuple form:time.gmtime (timestamp): Converted to international time tuple formtime.localtime (timestamp): Convert to local time tuple formtuple form---->

Time Module Timing and datetime ()Time is represented in three formats 1. Timestamp 2. Time tuple 3. Formatted string (2017-11-1)Timestamp: Typically, a timestamp represents an offset that is calculated in seconds from 00:00:00 Greenwich on January 1, 1970Time zone: World Standard Time UTC (Greenwich Astronomical Time)China time for Utc+8 says East eight districtDST: Daylight Saving TimeImport timeTime.time () #获取当前的时间戳Time.timezone () #查看当前的本地时间和世界标准

Import datetimeImport timeString to DateTime str = ' 2012-11-19 ' Date_time = Datetime.datetime.strptime (str, '%y-%m-%d ') Date_time Datetime.datetime (2012,11,19,0,0)DateTime Turn String Date_time.strftime ('%y-%m-%d ') ' 2012-11-19 'DateTime turn Timestamp

item can be a module or package, but not a class, function, or variable;2. When using the From package import item, item can be either a child module or a child package of the package, or another name defined in the packet (such as a function, class, or variable); First Check if item is defined in the packet. However, if it is not found, it is assumed that item is a module and tries to load it and throws a Importerror exception when it fails. 3. From pacakge Import * if the __init__.py of the p

(datetime.datetime.now())In [156]: 2018-02-12 12:39:43.309016 Time arithmeticIn [174]: datetime.datetime.now() + datetime.timedelta(1)Out[174]: datetime.datetime(2018, 2, 13, 12, 43, 12, 301435)In [175]: datetime.datetime.now() - datetime.timedelta(1)Out[175]: datetime.datetime(2018, 2, 11, 12, 43, 28, 154795)In [181]: datetime.datetime.now() + datetime.timedelta(hours=1)Out[181]: datetime.datetime(2018, 2, 12, 13, 44, 54, 816476)In [182]: datetime.datetime.now() + datetime.timedelta

At the same time, the DateTime is also a simple introduction. Because there are a lot of things that need to be used on their own, to find help is most effective. Example: Calculates the last Friday and outputs. Answer: Copy Code code as follows: Import datetime, Calendar Lastfriday = Datetime.date.today () Oneday = Datetime.timedelta (Days=1) Las