.. _dict-init-mutate:

dict-init-mutate / C3401
========================

**Message emitted:**

``Declare all known key/values when initializing the dictionary.``

**Description:**

*Dictionaries can be initialized with a single statement using dictionary literal syntax.*

**Problematic code:**

.. literalinclude:: /data/messages/d/dict-init-mutate/bad.py
   :language: python

**Correct code:**

.. literalinclude:: /data/messages/d/dict-init-mutate/good.py
   :language: python

**Configuration file:**

.. literalinclude:: /data/messages/d/dict-init-mutate/pylintrc
    :language: ini





.. note::
  This message is emitted by the optional :ref:`'dict-init-mutate'<pylint.extensions.dict_init_mutate>`
  checker, which requires the ``pylint.extensions.dict_init_mutate`` plugin to be loaded.

Created by the `dict-init-mutate <https://github.com/pylint-dev/pylint/blob/main/pylint/extensions/dict_init_mutate.py>`__ checker.