PythonDatetime类的Isocalendar()方法

isocalendar()函数用于返回 ISO 年、ISO 周数和 ISO 工作日的元组。

笔记：

根据 ISO 标准 8601 和 ISO 标准 2015，星期四是一周的中间一天。
因此，ISO 年总是从星期一开始。
ISO 年可以从每年的 1 月 29 日开始，也可以从公历的 1 月 4 日开始。
ISO 年可以有 52 个整周或 53 个整周。
ISO 年在年初或年末没有任何小数周。

Syntax: isocalendar()

Parameters: This function does not accept any parameter.

Return values: This function returns a tuple of ISO Year, ISO Week Number and ISO Weekday.

编程需要懂一点英语

示例 1：使用今天的日期。

Python3

# Python3 code to demonstrate
# Getting a tuple of ISO Year,
# ISO Week Number and ISO Weekday
  
# Importing date module from datetime
from datetime import date
  
# Calling the today() function
# to return todays date
Todays_date = date.today()
  
# Printing today's date
print(Todays_date)
  
# Calling the isocalendar() function
# over the above today's date to return
# its ISO Year, ISO Week Number
# and ISO Weekday
print(Todays_date.isocalendar())

Python3

# Python3 code to demonstrate
# Getting a tuple of ISO Year,
# ISO Week Number and ISO Weekday
  
# Importing date module from datetime
from datetime import date
  
# Creating an instance for
# different dates
A = date(2020, 10, 11)
  
# Calling the isocalendar() function
# over the above specified date
Date = A.isocalendar()
  
# Printing Original date and its
# ISO Year, ISO Week Number
# and ISO Weekday
print("Original date:",A)
print("Date in isocalendar is:", Date)

输出：

2021-07-25
(2021, 29, 7)

示例 2：使用特定日期。

蟒蛇3

# Python3 code to demonstrate
# Getting a tuple of ISO Year,
# ISO Week Number and ISO Weekday
  
# Importing date module from datetime
from datetime import date
  
# Creating an instance for
# different dates
A = date(2020, 10, 11)
  
# Calling the isocalendar() function
# over the above specified date
Date = A.isocalendar()
  
# Printing Original date and its
# ISO Year, ISO Week Number
# and ISO Weekday
print("Original date:",A)
print("Date in isocalendar is:", Date)

输出：

Original date: 2020-10-11
Date in isocalendar is: (2020, 41, 7)