pyqpanda.Visualization.parameterexpression

ParameterExpression Class to enable creating simple expressions of Parameters.

Module Contents

Classes

ParameterExpression

ParameterExpression class to enable creating expressions of Parameters.

class pyqpanda.Visualization.parameterexpression.ParameterExpression(symbol_map, expr)

ParameterExpression class to enable creating expressions of Parameters.

property parameters

Returns a set of the unbound Parameters in the expression.

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.

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.