data_structures.stacks.prefix_evaluation
========================================

.. py:module:: data_structures.stacks.prefix_evaluation

.. autoapi-nested-parse::

   Python3 program to evaluate a prefix expression.



Attributes
----------

.. autoapisummary::

   data_structures.stacks.prefix_evaluation.calc
   data_structures.stacks.prefix_evaluation.test_expression


Functions
---------

.. autoapisummary::

   data_structures.stacks.prefix_evaluation.evaluate
   data_structures.stacks.prefix_evaluation.is_operand


Module Contents
---------------

.. py:function:: evaluate(expression)

   Evaluate a given expression in prefix notation.
   Asserts that the given expression is valid.

   >>> evaluate("+ 9 * 2 6")
   21
   >>> evaluate("/ * 10 2 + 4 1 ")
   4.0


.. py:function:: is_operand(c)

   Return True if the given char c is an operand, e.g. it is a number

   >>> is_operand("1")
   True
   >>> is_operand("+")
   False


.. py:data:: calc

.. py:data:: test_expression
   :value: '+ 9 * 2 6'