Python date and time

Python date and time

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import time;  # 引入time模块

ticks = time.time()
print "当前时间戳为:", ticks

当前时间戳为: 1459994552.51

What is a time group?

Many Python functions process time with 9 sets of numbers assembled in one meta:

The above is struct_time the two metagroups. This structure has the following properties:

Gets the current time

Switch from the time drop that returns floats to the time group, as long as the floats are passed to a function such as localtime.

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import time

localtime = time.localtime(time.time())
print "本地时间为 :", localtime

The above example output results:

本地时间为 : time.struct_time(tm_year=2016, tm_mon=4, tm_mday=7, tm_hour=10, tm_min=3, tm_sec=27, tm_wday=3, tm_yday=98, tm_isdst=0)

Gets the time it was formatted

You can choose from a variety of formats depending on your needs, but the simplest function to get readable time patterns is asctime():

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import time

localtime = time.asctime( time.localtime(time.time()) )
print "本地时间为 :", localtime

The above example output results:

本地时间为 : Thu Apr  7 10:05:21 2016

Format the date

We can format the date using the strftime method of the time module:

time.strftime(format[, t])

#!/usr/bin/python
# -*- coding: UTF-8 -*-
import time
# 格式化成2016-03-20 11:45:39形式
print time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()) 
# 格式化成Sat Mar 28 22:24:24 2016形式
print time.strftime("%a %b %d %H:%M:%S %Y", time.localtime()) 
  
# 将格式字符串转换为时间戳
a = "Sat Mar 28 22:24:24 2016"
print time.mktime(time.strptime(a,"%a %b %d %H:%M:%S %Y"))

The above example output results:

Time date formatting symbol in Python:

%y Two-digit year (00-99)

%Y four-digit year (000-9999)

%m month (01-12)

One day in %d month (0-31)

%H 24 hours (0-23)

%I 1 2 hours (01-12)

%M minutes (00 s 59)

%S Seconds (00-59)

%a Local simplified week name

%A local full week name

%b Local simplified month name

%B Local full month name

%c Local corresponding date and time represents

%j Day of the Year (001-366)

%p Local A.M. or P.M. equivalent

%U The number of weeks of the year (00-53) Sunday is the beginning of the week

%w week (0-6), Sunday is the beginning of the week

%W The number of weeks of the year (00-53) Monday is the beginning of the week

%x locally represented by the corresponding date

%X is locally represented by the appropriate time

The name of the current time zone for %Z

%% % sign itself

Get a calendar for a month

The Calendar module has a wide range of methods for working with annual and monthly calendars, such as printing monthly calendars for a month:

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import calendar

cal = calendar.month(2016, 1)
print "以下输出2016年1月份的日历:"
print cal;

The above example output results:

以下输出2016年1月份的日历:
    January 2016
Mo Tu We Th Fr Sa Su
             1  2  3
 4  5  6  7  8  9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31

Time module

The Time module contains the following built-in functions, both in the time-processing phase and in the conversion time format:

The Time module contains two very important properties:

Calendar module

The functions of this module are calendar-related, such as printing a month's character calendar.

Monday is the default first day of the week, and Sunday is the default last day. C hanging the settings requires calling the calendar.setfirstweekday() function. The module contains the following built-in functions:

Other related modules and functions

In the Python species, other modules that process dates and times are:

• Datetime module
• pytz module
• Dateutil module