bugfix: Replaced inappropriate is comparison with ==

[fazledyn]

Introduction

This PR fixes a logical bug in your codebase

Description

In file gui.py, there's a comparison that compares an empty list to an object using is operator. This is not the correct way to compare objects with empty list or dict.

For example, running the code below will give the output:

x = []
print(x is [])

False

As a result, it's better to perform comparison using == operator than is.

Contribution

All contributions made in this PR follows Developer Certificate of Origin

Comments

If you think such fixes aren't necessary for your project, and you'd like me to find some better bugs / code-to-fix, then please let me know. I'll be happy to contribute.

[donn]

No, this is super helpful. I'm left wondering why the linter didn't catch that.

Thank you.