.. _assert-on-tuple:

assert-on-tuple / W0199
=======================

**Message emitted:**

Assert called on a 2-item-tuple. Did you mean 'assert x,y'?

**Description:**

*A call of assert on a tuple will always evaluate to true if the tuple is not empty, and will always evaluate to false if it is.*


**Correct code:**

.. code-block:: python

  x, y = (1, None)
  assert x
  assert y


**Problematic code:**

.. code-block:: python

  assert (1, None)  # [assert-on-tuple]




Created by ``basic`` checker