none-comparison (E711)

Derived from the pycodestyle linter.

Fix is always available.

What it does

Checks for comparisons to None which are not using the is operator.

Why is this bad?

According to PEP 8, "Comparisons to singletons like None should always be done with is or is not, never the equality operators."

Example

if arg != None:
    pass
if None == arg:
    pass

Use instead:

if arg is not None:
    pass