Implement an N-Puzzle solver in Python.

.. literalinclude:: ../../languages/python/algorithm_npuzzle.py
   :language: python
   :tab-width: 4

.. runcode:: ../../languages/python/algorithm_npuzzle.py
   :language: python
   :codesite: ideone

.. seealso::

   * :python-suggest-improve:`algorithm_npuzzle.py`
   * :python-better-explain:`algorithm_npuzzle.rst`