qiskit.circuit.ParameterExpression.subs

ParameterExpression.subs(parameter_map, allow_unknown_parameters=False)

Returns a new Expression with replacement Parameters.

Parameters

• parameter_map (Dict) – Mapping from Parameters in self to the ParameterExpression instances with which they should be replaced.

• allow_unknown_parameters (bool) – If False, raises an error if parameter_map contains Parameters in the keys outside those present in the expression. If True, any such parameters are simply ignored.

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.

Return type

ParameterExpression

Returns

A new expression with the specified parameters replaced.