QuadraticProgram.substitute_variables¶
- QuadraticProgram.substitute_variables(constants=None, variables=None)[source]¶
Substitutes variables with constants or other variables.
- Parameters
constants (
Optional[Dict[Union[int,str],float]]) – replace variable by constant e.g., {‘x’: 2} means ‘x’ is substituted with 2variables (
Optional[Dict[Union[str,int],Tuple[Union[str,int],float]]]) – replace variables by weighted other variable need to copy everything using name reference to make sure that indices are matched correctly. The lower and upper bounds are updated accordingly. e.g., {‘x’: (‘y’, 2)} means ‘x’ is substituted with ‘y’ * 2
- Return type
- Returns
An optimization problem by substituting variables with constants or other variables. If the substitution is valid, QuadraticProgram.status is still QuadraticProgram.Status.VALIAD. Otherwise, it gets QuadraticProgram.Status.INFEASIBLE.
- Raises
QiskitOptimizationError – if the substitution is invalid as follows. - Same variable is substituted multiple times. - Coefficient of variable substitution is zero.