.. _unnecessary-lambda-assignment:

unnecessary-lambda-assignment / C3001
=====================================

**Message emitted:**

``Lambda expression assigned to a variable. Define a function using the "def" keyword instead.``

**Description:**

*Used when a lambda expression is assigned to variable rather than defining a standard function with the "def" keyword.*

**Problematic code:**

.. literalinclude:: /data/messages/u/unnecessary-lambda-assignment/bad.py
   :language: python

**Correct code:**

.. literalinclude:: /data/messages/u/unnecessary-lambda-assignment/good.py
   :language: python





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