Refactor student_list.py

[kn-neelalohitha]

What is this PR/ Why this PR?

This PR refactors StudentsList class in the student_list.py by

Modifications:

• Removed the parameter class_name from the methods make_xl_name() and make_pkl_name().

Reason: The methods make_xl_name() and make_pkl_name() earlier consumed class_name to output the complete file path. However, this is not required as the class_name being an attribute of StudentsList class in the student_list.py can be accessed directly without explicit passing.

• Added docstrings and a minor comment.

Signed-off-by: knn kn.neelalohitha@gmail.com

[kn-neelalohitha]

Docstrings are added in __init__ and make_xl_name Either drop the docstrings from both of them or add docstrings to StudentsList, make_pkl_file, load_pkl_file and make_pkl_name as well.

Docstring is added to all of them. For StudentsList class I have summarised what it does and briefly explained about class variables names and rolls. I skipped writing docstrings for the public class methods as it would be an unwanted repetition.

[Vibhu-Agarwal]

Thanks for the PR @kn-neelalohitha 🎉

[kn-neelalohitha]

It's a pleasure contributing to this project!