.. _impossible-comparison:

impossible-comparison / R1739
=============================

**Message emitted:**

``This comparison always evaluates to False``

**Description:**

*Emitted when a boolean condition contains a chain of comparisons that is logically contradictory and can never be true (e.g. ``a > b and b > a``).*

**Problematic code:**

.. literalinclude:: /data/messages/i/impossible-comparison/bad.py
   :language: python

**Correct code:**

.. literalinclude:: /data/messages/i/impossible-comparison/good.py
   :language: python





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