pyqpanda.Visualization.parameterexpression
==========================================

.. py:module:: pyqpanda.Visualization.parameterexpression

.. autoapi-nested-parse::

   ParameterExpression Class to enable creating simple expressions of Parameters.



Classes
-------

.. autoapisummary::

   pyqpanda.Visualization.parameterexpression.ParameterExpression


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

.. py:class:: ParameterExpression(symbol_map, expr)

   ParameterExpression class to enable creating expressions of Parameters.


   .. py:property:: parameters

      Returns a set of the unbound Parameters in the expression.



   .. py:method:: bind(parameter_values)

      Binds the provided set of parameters to their corresponding values.

      Args:
          parameter_values (dict): 
              Mapping of Parameter instances to the
              numeric value to which they will be bound.

      Raises:
          CircuitError:
              If parameter_values contains Parameters outside those in self.
              If a non-numeric value is passed in parameter_values.
          ZeroDivisionError:
              If binding the provided values requires division by zero.

      Returns:
          ParameterExpression: 
              a new expression parameterized by any parameters
              which were not bound by parameter_values.



   .. py:method:: subs(parameter_map)

      Returns a new Expression with replacement Parameters.

      Args:
          parameter_map (dict): 
              Mapping from Parameters in self to the
              Parameter instances with which they should be
              replaced.

      Raises:
          CircuitError:
              If parameter_map contains Parameters outside those in self.
              If the replacement Parameters in parameter_map would result in
                a name conflict in the generated expression.

      Returns:
          ParameterExpression: a new expression with the specified parameters
                               replaced.