pyepo.model.copt
================

.. py:module:: pyepo.model.copt

.. autoapi-nested-parse::

   Optimization Model based on Cardinal Optimizer（COPT）



Submodules
----------

.. toctree::
   :maxdepth: 1

   /autoapi/pyepo/model/copt/coptmodel/index
   /autoapi/pyepo/model/copt/knapsack/index
   /autoapi/pyepo/model/copt/shortestpath/index


Classes
-------

.. autoapisummary::

   pyepo.model.copt.optCoptModel
   pyepo.model.copt.shortestPathModel
   pyepo.model.copt.knapsackModel
   pyepo.model.copt.knapsackModelRel


Package Contents
----------------

.. py:class:: optCoptModel

   Bases: :py:obj:`pyepo.model.opt.optModel`


   This is an abstract class for Cardinal Optimizer optimization model

   .. attribute:: _model

      COPT model

      :type: COPT model


   .. py:method:: __repr__()


   .. py:method:: setObj(c)

      A method to set objective function

      :param c: cost of objective function
      :type c: np.ndarray / list



   .. py:method:: solve()

      A method to solve model

      :returns: optimal solution (list) and objective value (float)
      :rtype: tuple



   .. py:method:: copy()

      A method to copy model

      :returns: new copied model
      :rtype: optModel



   .. py:method:: addConstr(coefs, rhs)

      A method to add new constraint

      :param coefs: coeffcients of new constraint
      :type coefs: np.ndarray / list
      :param rhs: right-hand side of new constraint
      :type rhs: float

      :returns: new model with the added constraint
      :rtype: optModel



.. py:class:: shortestPathModel(grid)

   Bases: :py:obj:`pyepo.model.copt.coptmodel.optCoptModel`


   This class is optimization model for shortest path problem

   .. attribute:: _model

      Pyomo model

      :type: PyOmo model

   .. attribute:: solver

      optimization solver in the background

      :type: str

   .. attribute:: grid

      size of grid network

      :type: tuple of int

   .. attribute:: arcs

      list of arcs

      :type: list


   .. py:attribute:: grid


   .. py:attribute:: arcs
      :value: []



   .. py:method:: _getArcs()

      A method to get list of arcs for grid network

      :returns: arcs
      :rtype: list



   .. py:method:: _getModel()

      A method to build pyomo model



.. py:class:: knapsackModel(weights, capacity)

   Bases: :py:obj:`pyepo.model.copt.coptmodel.optCoptModel`


   This class is optimization model for knapsack problem

   .. attribute:: _model

      Pyomo model

      :type: PyOmo model

   .. attribute:: solver

      optimization solver in the background

      :type: str

   .. attribute:: weights

      weights of items

      :type: np.ndarray

   .. attribute:: capacity

      total capacity

      :type: np.ndarray

   .. attribute:: items

      list of item index

      :type: list


   .. py:attribute:: weights


   .. py:attribute:: capacity


   .. py:attribute:: items


   .. py:method:: _getModel()

      A method to build pyomo model



   .. py:method:: relax()

      A method to get linear relaxation model



.. py:class:: knapsackModelRel(weights, capacity)

   Bases: :py:obj:`knapsackModel`


   This class is relaxed optimization model for knapsack problem.


   .. py:method:: _getModel()

      A method to build pyomo



   .. py:method:: relax()

      A forbidden method to relax MIP model