Python version 3.51.datetime Package Import methodThere are two ways to import a DateTime package ( new Note ):The first type: import datetime # Importing Time date>>> get current time: now = Datetime.datetime.now ()-------2017-09-15 11:29:21.796463>>> get today's date: day = Datetime.date.today ()---------2017-09-15>>
DateTime moduleThe interface of the DateTime module is more intuitive and easier to invoke than the time moduleThe DateTime module defines the following classes:
Datetime.date: A class that represents a date. The commonly used attributes are year, month and day;
Datetime.time: A class that represents time. The commonly used properties are hour, minut
) converts a time string to an array of time based on the specified format characterin [+]: time.strptime (' 20130810 ', "%y%m%d") out[26]: Time.struct_time (tm_year=2013, tm_mon=8, tm_mday=10, tm_hour=0, Tm_min=0, Tm_sec=0, tm_wday=5, tm_yday=222, Tm_isdst=-1)Note that the timestamp cannot be converted directly to a string, and the time string cannot be converted directly to a timestamp, but only through localtime, using the Mktime method to turnTwo. DateTi
DateTime encapsulates a number of methods on a time basis. But time is often used, the function in datetime, time can achieve one, datetime of three modules Datetime.datedatetime.timedatetime.datetime mainly use this module import Datetime1, Datetime.datetime.now () Gets the current time, DateTime format T1=datetime.da
Python provides a variety of processing methods for time and date, mainly in the two modules of the Times and DateTime. Today, a little comb the two modules in the use of some of the differences and links.
TimeIn the Python documentation, time is categorized in generic Operating system services, in other words, it provides functionality that is closer to the ope
Daily use of the Python datetime module[10:52:43] [Email protected]| ~]# pythonPython 2.7.12 (Default, June 27 2017, 11:19:01)[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux2Type "Help", "copyright", "credits" or "license" for more information.>>> Import datetime# Get current time, output in string format>>> datetime.datetime.now () # Output current time,
Time in Python is generally not used to take a date, usually a datetime module.
First, talk about one of TIME's unique methods:
Import time to
I in Xrange (1,10):
print (i)
time.sleep (1)The use of a sleep timer is a good idea.
Now say the use of the DateTime module, especially useful. Now show the Code
# DateTime's use
from
The datetime module in Python is a powerful, but complex, module that deals with time-related content.The code is used to find the timestamp from MySQL and the current time comparison, the method of finding the differenceImport datetimeLasttime=a.get_last_timestamp (sid=40) [ -1]["Last_time"] #取到timestampDelta = datetime.datetime.now ()-lasttime #使用datetime. Date
Python processing is a big hole in the time zone when dealing with the conversion of datetime and timestamp in Python.Because the python time is handled by the default localtime input, the script runs locally and runs on the server, resulting in a different result. If you don't pay attention, you'll be in the middle.R also encounters time zone problems, but the R
1. Time
The first is the way the timestamp is (relative to the offset from 1970.1.1 00:00:00 in seconds), the timestamp is unique
Time.time ()
The second is represented as an array of (Struct_time), a total of nine elements, respectively, that the same timestamp of the struct_time will vary depending on the time zone
Time.localtime ()
Gmtime () and mktime () can freely convert two time representation methods
>>> Time.gmtime (Time.time ()) time.struct_tim
#turn datetime into a stringdefdatetime_tostring (DT):returnDt.strftime ("%y-%m-%d-%h")#turn a string into a datetimedefstring_todatetime (String):returnDatetime.strptime (String,"%y-%m-%d-%h")#turn the string into a timestamp formdefString_totimestamp (strtime):returnTime.mktime (String_todatetime (strtime). Timetuple ())#Turn the timestamp into a string formdeftimestamp_tostring (stamp):returnTime.strftime ("%y-%m-%d-%h", Tiem.localtime (stamp))#tur
, month name, fullThe time string for the date of the%c standard complete date representationThe day of the month in%d decimal notation%H 24-Hour hour Hour (24-hour clock)%I 12-Hour hour Hour (12-hour clock)%j decimal represents the day of the Week of the year%m decimal indicates month months%M minutes by 10 o'clock Minute number%s Decimal seconds Second number%u the week of the year, the Sunday as the first day (value from 0 to Week number) (Sunday-weekday)%w Decimal Day of the week (value from
') # 2018-04-04 09:39# print (' Current time ', t) # MM = Start.format (' hh:mm ') # 09:48# current time plus 1 Minutes # n = now.shift (Minutes=1) # print (' Current time plus 1 minutes ', N.format (' Yyyy-mm-dd hh:mm ')) # current time plus 1 hours # n = now.shift (Hours=1) # print (' Current time plus 1 hours ', N.format (' Yyyy-mm-dd hh:mm ')) # n = now.shift (Months=1) # print (' Current time plus January ', N.format (' Yyyy-mm-dd hh:mm ')) # n = Now.shift (Years=1) # print (' Current time
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:
Calculate and output the last Friday.
Answer:
CopyCodeThe Code is as follows: Import datetime, calendar
Lastfriday = datetime. Date. Today ()Oneday =
Datetime.timedelta date, and Calendar.monthrange () method to get the number of days of the month1, first of all, respectively, constructionthis month, number 1th datetime--date_now = Datetime.datetime (Year=year, Month=month, Day=1) # constructs datetime 1th this monthDateTime for the last day of the month2, because the Timedelta maximum support only to the days parameter, this month 1th minus 1 is the la
It's inconvenient to use Python!Datetime data obtained from the database, such:
This created is a datetime dataCannot be directly used for page display, as JSON data transmission, etc.One method is as follows:Created = str (obj. created. year) + '-' + str (obj. created. month) + '-' + str (obj. created. day) + ''+ str (obj. created. hour) + ':' + str (obj. creat
of the year, daylight saving time No)12:strftime () Custom format output time stringThe time format is as follows:13:fromordinal () returns a date for the number of days from the Gregorian origin14:fromtimestamp (), give a timestamp and return a date. is to give the number of seconds from the time stamp origin (1970-1-1 0:0:0), and return the dateGiven 80,000 seconds, it is the beginning of (1970-1-1 0:0:0), the date of 80,000 seconds.15:replace () Replace old date with new date16:resolution Da
Http://www.2cto.com/kf/201109/102535.htmlhttp://www.cnblogs.com/goodspeed/archive/2011/11/06/python_time.html python time.time (), Mktime, datetime parsing One of the time forms used in Highcharts is the following, which represents the difference between this time value and 1970/1/1, noting that the unit is milliseconds, while the Python mktime is in seconds and
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