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Python Dates

2023-03-12 18:23| 来源: 网络整理| 查看: 265

Python Datetime ❮ Previous Next ❯ Python Dates

A date in Python is not a data type of its own, but we can import a module named datetime to work with dates as date objects.

Example

Import the datetime module and display the current date:

import datetime

x = datetime.datetime.now()print(x)

Try it Yourself » Date Output

When we execute the code from the example above the result will be:

The date contains year, month, day, hour, minute, second, and microsecond.

The datetime module has many methods to return information about the date object.

Here are a few examples, you will learn more about them later in this chapter:

Example

Return the year and name of weekday:

import datetime

x = datetime.datetime.now()

print(x.year) print(x.strftime("%A"))

Try it Yourself » Creating Date Objects

To create a date, we can use the datetime() class (constructor) of the datetime module.

The datetime() class requires three parameters to create a date: year, month, day.

Example

Create a date object:

import datetime

x = datetime.datetime(2020, 5, 17)

print(x)

Try it Yourself »

The datetime() class also takes parameters for time and timezone (hour, minute, second, microsecond, tzone), but they are optional, and has a default value of 0, (None for timezone).

The strftime() Method

The datetime object has a method for formatting date objects into readable strings.

The method is called strftime(), and takes one parameter, format, to specify the format of the returned string:

Example

Display the name of the month:

import datetime

x = datetime.datetime(2018, 6, 1)

print(x.strftime("%B"))

Try it Yourself »

A reference of all the legal format codes:

Directive Description Example Try it %a Weekday, short version Wed Try it » %A Weekday, full version Wednesday Try it » %w Weekday as a number 0-6, 0 is Sunday 3 Try it » %d Day of month 01-31 31 Try it » %b Month name, short version Dec Try it » %B Month name, full version December Try it » %m Month as a number 01-12 12 Try it » %y Year, short version, without century 18 Try it » %Y Year, full version 2018 Try it » %H Hour 00-23 17 Try it » %I Hour 00-12 05 Try it » %p AM/PM PM Try it » %M Minute 00-59 41 Try it » %S Second 00-59 08 Try it » %f Microsecond 000000-999999 548513 Try it » %z UTC offset +0100 %Z Timezone CST %j Day number of year 001-366 365 Try it » %U Week number of year, Sunday as the first day of week, 00-53 52 Try it » %W Week number of year, Monday as the first day of week, 00-53 52 Try it » %c Local version of date and time Mon Dec 31 17:41:00 2018 Try it » %C Century 20 Try it » %x Local version of date 12/31/18 Try it » %X Local version of time 17:41:00 Try it » %% A % character % Try it » %G ISO 8601 year 2018 Try it » %u ISO 8601 weekday (1-7) 1 Try it » %V ISO 8601 weeknumber (01-53) 01 Try it » ❮ Previous Next ❯


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