`simplify-boolean-comparison` should not be triggered by `is` operator

[Czaki]

Issue description or question

Simplifying boolean comparison should not touch is operator usage as it directly checks type, not result of conversion to bool.

Sourcery Version

0.12.1

Code editor or IDE name and version

PyCharm 2022.1.3 (Professional Edition) Build #PY-221.5921.27, built on June 21, 2022

OS name and version

Linux

[reka]

Hi @Czaki ,

Thanks for bringing up this issue.

It's a good question :thinking: : I also think is False sounds natural, especially in a test.

But PEP 8 says not to compare boolean values to True or False using == or is, so we've decided to add this as a general rule.

Don’t compare boolean values to True or False using ==:

# Correct:
if greeting:

# Wrong:
if greeting == True:

Worse:

# Wrong:
if greeting is True:

https://peps.python.org/pep-0008/#programming-recommendations

Skipping This Recommendation

If you want to keep the syntax with is False, you can skip this recommendation by Sourcery:

# sourcery skip: simplify-boolean-comparison

This will deactivate all simplify-boolean-comparison recommendations in the current function.

Cheers, Reka

[Czaki]

But there is a syntax to disable it globally for giving a tree of files (whole test folder)?

I know that mypy is the best solve of this problem, but not all projects are ready for this.

[reka]

But there is a syntax to disable it globally for giving a tree of files (whole test folder)?

Unfortunately, we don't have this current configuration possibility yet. I see why it would sometimes make sense to disable a refactoring only for a subfolder, e.g. only for the tests. :thinking: We'll consider adding this configuration option.

The current options are:

• Disable this refactoring for the current function.
• Disable this refactoring globally for the whole project in the project config file.

The steps to disable simplify-boolean-comparison for the whole project:

1. Create a .sourcery.yaml project config file in the root directory of the project.
2. Add this snippet to .sourcery.yaml:

refactor:
  skip:
    - simplify-boolean-comparison

Related docs about the project config file

It's great to see a cool open source project like napari using Sourcery. :sunglasses: Would you mind having a quick chat with us? It would be awesome to hear which (further) improvements would make it more useful for you.