Pyomo Grey Box NLP Interface
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class
pyomo.contrib.pynumero.interfaces.pyomo_nlp.
PyomoGreyBoxNLP
(pyomo_model)[source] Bases:
NLP
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constraints_lb
()[source] Returns vector of lower bounds for the constraints
Return type: vector-like
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constraints_ub
()[source] Returns vector of upper bounds for the constraints
Return type: vector-like
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create_new_vector
(vector_type)[source] Creates a vector of the appropriate length and structure as requested
Parameters: vector_type ({'primals', 'constraints', 'duals'}) – String identifying the appropriate vector to create. Return type: vector-like
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evaluate_constraints
(out=None)[source] Returns the values for the constraints evaluated at the values given for the primal variales in set_primals
Parameters: out (array_like, optional) – Output array. Its type is preserved and it must be of the right shape to hold the output. Return type: vector_like
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evaluate_grad_objective
(out=None)[source] Returns gradient of the objective function evaluated at the values given for the primal variables in set_primals
Parameters: out (vector_like, optional) – Output vector. Its type is preserved and it must be of the right shape to hold the output. Return type: vector_like
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evaluate_hessian_lag
(out=None)[source] Return the Hessian of the Lagrangian function evaluated at the values given for the primal variables in set_primals and the dual variables in set_duals
Parameters: out (matrix_like (e.g., coo_matrix), optional) – Output matrix with the structure of the hessian already defined. Optional Return type: matrix_like
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evaluate_jacobian
(out=None)[source] Returns the Jacobian of the constraints evaluated at the values given for the primal variables in set_primals
Parameters: out (matrix_like (e.g., coo_matrix), optional) – Output matrix with the structure of the jacobian already defined. Return type: matrix_like
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evaluate_objective
()[source] Returns value of objective function evaluated at the values given for the primal variables in set_primals
Return type: float
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get_constraints_scaling
()[source] Return the desired scaling factors to use for the for the constraints. None indicates no scaling. This indicates potential scaling for the model, but the evaluation methods should return unscaled values
Return type: array-like or None
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get_duals
()[source] Get a copy of the values of the dual variables as provided in set_duals. These are the values that will be used in calls to the evaluation methods.
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get_obj_factor
()[source] Get the value of the objective function factor as set by set_obj_factor. This is the value that will be used in calls to the evaluation of the hessian of the lagrangian (evaluate_hessian_lag)
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get_obj_scaling
()[source] Return the desired scaling factor to use for the for the objective function. None indicates no scaling. This indicates potential scaling for the model, but the evaluation methods should return unscaled values
Return type: float or None
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get_primals
()[source] Get a copy of the values of the primal variables as provided in set_primals. These are the values that will be used in calls to the evaluation methods
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get_primals_scaling
()[source] Return the desired scaling factors to use for the for the primals. None indicates no scaling. This indicates potential scaling for the model, but the evaluation methods should return unscaled values
Return type: array-like or None
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get_pyomo_constraints
()[source] Return an ordered list of the Pyomo ConData objects in the order corresponding to the primals
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get_pyomo_objective
()[source] Return an instance of the active objective function on the Pyomo model. (there can be only one)
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get_pyomo_variables
()[source] Return an ordered list of the Pyomo VarData objects in the order corresponding to the primals
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primals_lb
()[source] Returns vector of lower bounds for the primal variables
Return type: vector-like
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primals_ub
()[source] Returns vector of upper bounds for the primal variables
Return type: vector-like
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report_solver_status
(status_code, status_message)[source] Report the solver status to NLP class using the values for the primals and duals defined in the set methods
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set_duals
(duals)[source] Set the value of the dual variables for the constraints to be used in calls to the evaluation methods (hessian_lag)
Parameters: duals (vector_like) – Vector with the values of dual variables for the equality constraints
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set_obj_factor
(obj_factor)[source] Set the value of the objective function factor to be used in calls to the evaluation of the hessian of the lagrangian (evaluate_hessian_lag)
Parameters: obj_factor (float) – Value of the objective function factor used in the evaluation of the hessian of the lagrangian
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