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not-is-test (E714)#

Derived from the pycodestyle linter.

Fix is always available.

What it does#

Checks for identity comparisons using not {foo} is {bar}.

Why is this bad?#

According to PEP8, testing for an object's identity with is not is more readable.


if not X is Y:
Z = not X.B is Y

Use instead:

if X is not Y:
Z = X.B is not Y