create a class variable frmo day to day delta in python

datetime.timedelta can be used to represent the difference between two dates. In order to create a class variable representing delta from day to day, we can create a staticmethod that takes two dates as input and returns a timedelta representing the difference between them.

Here's an example:

main.py
import datetime

class MyClass:
    
    @staticmethod
    def days_delta(date1, date2):
        delta = date2 - date1
        return delta.days

#Example usage
date1 = datetime.date(2021, 9, 1)
date2 = datetime.date(2021, 10, 1)
delta = MyClass.days_delta(date1, date2)
print(delta) # Output will be 30, representing the difference between 2 dates

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In this example, MyClass has a staticmethod called days_delta, which takes two datetime.date objects as arguments. The days_delta method returns the number of days between the two dates as an integer.

You can then call the days_delta method without needing to create instance of the class.

Note that in the above example the date class is from datetime module.