.. _nan-comparison:

nan-comparison / W0177
======================

**Message emitted:**

``Comparison %s should be %s``

**Description:**

*Used when an expression is compared to NaN values like numpy.NaN and float('nan').*

**Problematic code:**

.. literalinclude:: /data/messages/n/nan-comparison/bad.py
   :language: python

**Correct code:**

.. literalinclude:: /data/messages/n/nan-comparison/good.py
   :language: python





Created by the `basic <https://github.com/pylint-dev/pylint/blob/main/pylint/checkers/base/comparison_checker.py>`__ checker.