Python datetime isocalendar（）方法与示例

Python datetime.isocalendar()方法 (Python datetime.isocalendar() Method)

datetime.isocalendar() method is used to manipulate objects of datetime class of module datetime.

datetime.isocalendar()方法用于操作模块datetime的datetime类的对象。

It uses a datetime class object and returns a 3-tuple (ISO year, ISO week number, ISO weekday).

它使用datetime类对象并返回3元组(ISO年，ISO周号，ISO工作日)。

Most of the date and time calendar follow the Gregorian calendar. The ISO calendar is a widely used variant of the Gregorian one. The ISO year consists of 52 or 53 full weeks, and where a week starts on a Monday and ends on a Sunday. The first week of an ISO year is the first (Gregorian) calendar week of a year containing a Thursday. This is called week number 1, and the ISO year of that Thursday is the same as its Gregorian year.
For example, 2004 begins on a Thursday, so the first week of ISO year 2004 begins on Monday, 29 Dec 2003 and ends on Sunday, 4 Jan 2004:

大多数日期和时间日历都遵循公历。 ISO日历是公历之一的广泛使用的变体。 ISO年度包括52或53个整周，其中一个星期从星期一开始，在星期日结束。 ISO年的第一周是包含星期四的一年中的第一个(格里高利历)日历周。这称为第1周，该周四的ISO年与其公历年相同。
例如，2004年从星期四开始，因此ISO 2004年的第一周从2003年12月29日星期一开始，到2004年1月4日星期日结束：

Weekday number for Monday is 1 while incrementing by 1 for the coming days.

星期一的工作日数为1，而接下来的几天则增加1。

Module:

模块：

    import datetime

Class:

类：

    from datetime import datetime

Syntax:

句法：

    isocalendar()

Parameter(s):

参数：

None
没有

Return value:

返回值：

The return type of this method is a tuple which tells us what is the ISO year, ISO week and the ISO weekday of that date.

此方法的返回类型是一个元组，它告诉我们什么是ISO年，ISO周和该日期的ISO工作日。

Example:

例：

## importing datetime class
from datetime import datetime
## Creating an instance
x = datetime.now()
d = x.isocalendar()
print("Original date:",x)
print("Today's date in isocalendar is:", d)
print()
x = datetime(2004, 10, 30, 12, 12, 12)
d = x.isocalendar()
## this returns a date object, extracted from 
## the datetime object
dd = x.date()
print("Date", str(dd) ,"in isocalendar is:", d)
print()
x = datetime(2020, 10, 27, 10, 3, 33)
d = x.isocalendar()
dd = x.date()
print("Original date was:",str(dd))
print("ISO year:",d[0],"ISO week:",d[1],"ISO weekday:",d[2])

Output

输出量

Original date: 2020-05-01 22:40:19.039474
Today's date in isocalendar is: (2020, 18, 5)
Date 2004-10-30 in isocalendar is: (2004, 44, 6)
Original date was: 2020-10-27
ISO year: 2020 ISO week: 44 ISO weekday: 2