.. _use-implicit-booleaness-not-comparison:

use-implicit-booleaness-not-comparison / C1803
==============================================

**Message emitted:**

``"%s" can be simplified to "%s", if it is strictly a sequence, as an empty %s is falsey``

**Description:**

*Empty sequences are considered false in a boolean context. Following this check blindly in weakly typed code base can create hard to debug issues. If the value can be something else that is falsey but not a sequence (for example ``None``, an empty string, or ``0``) the code will not be equivalent.*

**Problematic code:**

.. literalinclude:: /data/messages/u/use-implicit-booleaness-not-comparison/bad.py
   :language: python

**Correct code:**

.. literalinclude:: /data/messages/u/use-implicit-booleaness-not-comparison/good.py
   :language: python





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