.. _using-f-string-in-unsupported-version:

using-f-string-in-unsupported-version / W2601
=============================================

**Message emitted:**

``F-strings are not supported by all versions included in the py-version setting``

**Description:**

*Used when the py-version set by the user is lower than 3.6 and pylint encounters an f-string.*

**Problematic code:**

.. literalinclude:: /data/messages/u/using-f-string-in-unsupported-version/bad.py
   :language: python

**Correct code:**

.. literalinclude:: /data/messages/u/using-f-string-in-unsupported-version/good.py
   :language: python

**Configuration file:**

.. literalinclude:: /data/messages/u/using-f-string-in-unsupported-version/pylintrc
    :language: ini

**Additional details:**

f-strings were introduced in Python version 3.6; to use them, please use a more recent version of Python.



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