Python: Get week number

Last update on April 22 2025 12:47:34 (UTC/GMT +8 hours)

13. Week Number Finder

Write a Python program to get the week number.

Sample Solution:

Python Code:

# Import the datetime module
import datetime

# Create a datetime object representing the date 'June 16, 2015' and retrieve its ISO calendar week number
# The isocalendar() method returns a tuple containing year, week number, and weekday
# We access the second element of the tuple, which represents the week number, using [1]
print(datetime.date(2015, 6, 16).isocalendar()[1])

Output:

Explanation:

In the exercise above,

The code imports the datetime module.
Get ISO Calendar week number:

It creates a "datetime" object representing the date 'June 16, 2015' using datetime.date(2015, 6, 16).
Then, it retrieves the ISO calendar week number of that date using the "isocalendar()" method.
The "isocalendar()" method returns a tuple containing year, week number, and weekday.
By accessing the second element of the tuple ([1]), which represents the week number, it obtains the ISO calendar week number.

Printing Results:

It prints the ISO calendar week number of the date 'June 16, 2015' using "print()".

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to determine the week number for a given date using the ISO calendar format.
Write a Python script to accept a date input and output the week number along with the corresponding year and weekday.
Write a Python program to compute the week number for today's date and then compare it with the week number of a past date.
Write a Python function to calculate and print the week number for a list of dates using a lambda function.

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