.. _trailing-comma-tuple:

trailing-comma-tuple / R1707
============================

**Message emitted:**

``Disallow trailing comma tuple``

**Description:**

*In Python, a tuple is actually created by the comma symbol, not by the parentheses. Unfortunately, one can actually create a tuple by misplacing a trailing comma, which can lead to potential weird bugs in your code. You should always use parentheses explicitly for creating a tuple.*

**Problematic code:**

.. literalinclude:: /data/messages/t/trailing-comma-tuple/bad.py
   :language: python

**Correct code:**

.. literalinclude:: /data/messages/t/trailing-comma-tuple/good.py
   :language: python





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