Comment the code

[chonix]

Please do comment the functions and classes. Make it easier for everyone. Also: it's a best practice

https://realpython.com/python-comments-guide/

• When you create a function, remember to comment what it does briefly (- Also, when creating a function, create the associated test case for it)
• When there's a bugfix, remember to add a comment code line before the fix, so it's easily to track it for reviewers (no, please don't tell me that you can see that when you link that to the commit in github)

[RyanSamman]

Commented on core.py, and stable parts of qt.py

[cherylli]

I've added docstrings and comments on everything I did

[cherylli]

I'm just trying incorporate this into the contribution doc. would it be better to add the bugfix commnets in the pull request comments rather than in the code?