How to Use datetime, time, and calendar in Python time module

This article describes how to use the Python time module, including the datetime, time, and calendar modules, interested friends can refer to this article to briefly summarize the Python processing time and date modules, mainly the use of datetime, time, and calendar ar modules, I hope this article will help my friends who are learning Python.

The first is the module call. Many ides have installed many modules that are frequently used by Python. Therefore, we do not need to install the modules for the time being.

import datetimeimport timeimport calendar

1. Get the accurate time at this time

# Obtain the current time print time. localtime ()

// The output format is time. struct_time (tm_year = 2015, tm_mon = 12, tm_mday = 29, tm_hour = 1, tm_min = 10, tm_sec = 25, tm_wday = 1, tm_yday = 363, tm_isdst = 0)

2. Get the date of the current day

# Obtain the date print datetime. datetime. now () print datetime. date. today () of the current day ()

3. Get the date of yesterday

# Retrieve the date def getYesterday (): today = datetime. date. today () oneday = datetime. timedelta (days = 1) yesterday = today-oneday print type (today) # view the obtained time type print type (yesterday) return yesterdayyesterday = getYesterday () print "yesterday's time: ", yesterday

4. Get the date n days ago
You don't need to provide the code. You can get the result by thinking about it.

5. String Conversion to time and date

# String Conversion to time def strTodatetime (datestr, format): return datetime. datetime. strptime (datestr, format) print time. strftime ("% Y-% m-% d", time. localtime () print strTodatetime ("2014-3-1", "% Y-% m-% d") print time. strftime ("% Y-% m-% d % H: % M: % S", time. localtime () print strTodatetime ("2005-2-16", "% Y-% m-% d")-strTodatetime ("2004-12-31", "% Y-% m-% d ")

Output result:

00:00:00
01:10:25
47 days, 0:00:00
6. Obtain calendar-related information

# Obtain the calendar of a month. The string type cal = calendar is returned. month (2015, 12) print calcalendar. setfirstweekday (calendar. SUNDAY) # set the first day of the calendar cal = calendar. month (2015, 12) print cal # obtain the calendar cal of a year = calendar ar. calendar (2015) print calcal = calendar. HTMLCalendar (calendar. MONDAY) print cal. formatmonth (2015, 12)

7. The calendar module can also handle the leap year problem.

# Determine whether a leap year is used. print calendar. isleap (2012) print calendar. leapdays (2010,201 5)

The datetime \ time module of Python is discussed in detail.

The meanings of escape characters are as follows:

• % A local simplified week name
  
• % A local full week name
  
• % B local simplified month name
  
• % B local full month name
  
• % C local Date and Time
  
• One day in % d month (0-31)
  
• % H hour in 24-hour format (0-23)
  
• % I 12-hour (01-12)
  
• % J one day in the year (001-366)
  
• % M month (01-12)
  
• % M minutes (00 = 59)
  
• % P local equivalent of A. M. or P. M.
  
• % S seconds (00-59)
  
• % U number of weeks in a year (00-53) Sunday is the start of the week
  
• % W Week (0-6), Sunday is the beginning of the week
  
• % W number of weeks in a year (00-53) Monday is the start of the week
  
• % X local date Representation
  
• % X Local Time Representation
  
• % Y two-digit year (00-99)
  
• % Y indicates the four-digit year (000-9999)
  
• % Z Current Time Zone name
  
• % Itself
  

Code:

Import time import datetime # two dates minus d1 = datetime. datetime (2005, 2, 16) d2 = datetime. datetime (2004, 12, 31) print (d1-d2 ). days # Run Time: starttime = datetime. datetime. now () endtime = datetime. datetime. now () print (endtime-starttime ). seconds # calculates the time from the current time to the next 10 days. # Replace hour days with hours d1 = datetime. datetime. now () d3 = d1 datetime. timedelta (days = 10) print str (d3) print d3.ctime () time. ctime ([sec]) # converts the number of seconds to the date format. If no parameter is specified, the current time is displayed. >>> Import time >>> time. ctime () >>> "Wed Jun 14 15:02:50 2006" >>> time. ctime (1138068452427683) "Sat Dec 14 04:51:44 1901" >>> import time >>> time. strftime ("% Y-% m-% d % X", time. localtime () "20:42:12"> time. strftime ("% Y-% m-% d % H: % M: % S", time. localtime () "20:03:47" DateTime module ------------------------------ datetime converts the date to seconds >>> import datetime, time >>> time. mktime (datetime. datetime (2009,1, 1 ). timetuple () 1230739200.0 >>> cc = [, 11,] # Attributes: year, month, day, hour, minute, second >>> time. mktime (datetime. datetime (cc [0], cc [1], cc [2], cc [3], cc [4], cc [5]). timetuple () 973226613.0time.time () gets the current time; time. localtime () gets the local time; time. strftime () format the date; time. strptime (timeString) converts a string to a date, and judges the input date as the day of the week >>> datetime. datetime (2011,02, 15 ). weekday () 1 >>> datetime. datetime (2011,02, 15 ). weekday () 1 >>> datetime. datetime (2011,02, 16 ). weekday () 2 >>> datetime. datetime (2011,02, 17 ). weekday () 3 >>> datetime module obtains the current time >>> datetime. datetime. utcnow () datetime. datetime (2011, 3, 15, 13, 19, 32,264 194) >>> datetime. datetime. utcnow (). strftime ("% Y-% m-% d % H: % M: % S") format '2017-03-15 13:19:27 '>>>

The above is a detailed study of the Python time module, hoping to help you learn Python programming.