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Python datetime isoweekday() Method with Example

Python datetime.isoweekday() Method: Here, we are going to learn about the isoweekday() method of datetime class in Python with its definition, syntax, and examples.
Submitted by Hritika Rajput, on May 02, 2020

Python datetime.isoweekday() Method

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

It uses a datetime class object and returns the day of the week as an integer, where Monday is 1 and Sunday is 7. It is the same as datetime.weekday() function where we consider Monday is 0 incrementing by one for the coming days. It is an instance method as it works on an instance of the date class.

Module:

    import datetime

Class:

    from datetime import datetime

Syntax:

    isoweekday()

Parameter(s):

  • None

Return value:

The return type of this method is a number which tells us what is the day of the week on that day.

Example:

## importing datetime class
from datetime import datetime

## Since we know the number, 
## we can save them in a list and 
## print the day on that number
day =["0","Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]

## Creating an instance
x = datetime.today() ## or use datetime.now()
d = x.isoweekday()
print("Today's isoweekday number is:", d)
print("Today's day is:",day[d])

x = datetime(2010, 1, 1)
print("Day on", x.year,"new year was:", day[x.isoweekday()])

x = datetime(2011, 1, 1)
print("Day on", x.year,"new year will be:", day[x.isoweekday()])

Output

Today's isoweekday number is: 5
Today's day is: Friday
Day on 2010 new year was: Friday
Day on 2011 new year will be: Saturday
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