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()方法用于操作模塊datetime的datetime類的對象。
It uses a datetime class object and returns a 3-tuple (ISO year, ISO week number, ISO weekday).
它使用datetime類對象并返回3元組(ISO年，ISO周號，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:
大多數日期和時間日歷都遵循公歷。 ISO日歷是公歷之一的廣泛使用的變體。 ISO年度包括52或53個整周，其中一個星期從星期一開始，在星期日結束。 ISO年的第一周是包含星期四的一年中的第一個(格里高利歷)日歷周。 這稱為第1周，該周四的ISO年與其公歷年相同。
例如，2004年從星期四開始，因此ISO 2004年的第一周從2003年12月29日星期一開始，到2004年1月4日星期日結束：
Weekday number for Monday is 1 while incrementing by 1 for the coming days.
星期一的工作日數為1，而接下來的幾天則增加1。
Module:
模塊：
import datetime
Class:
類：
from datetime import datetime
Syntax:
句法：
isocalendar()
Parameter(s):
參數：
None
沒有
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.
此方法的返回類型是一個元組，它告訴我們什么是ISO年，ISO周和該日期的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
輸出量
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
翻譯自: https://www.includehelp.com/python/datetime-isocalendar-method-with-example.aspx
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