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<article id="content">
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<header>
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<h1 class="title">Module <code>miplearn.solvers.pyomo.xpress</code></h1>
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</header>
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<section id="section-intro">
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<details class="source">
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<summary>
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<span>Expand source code</span>
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</summary>
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<pre><code class="python"># MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
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# Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
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# Released under the modified BSD license. See COPYING.md for more details.
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import logging
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from pyomo import environ as pe
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from scipy.stats import randint
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from miplearn.solvers.pyomo.base import BasePyomoSolver
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from miplearn.types import SolverParams
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logger = logging.getLogger(__name__)
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class XpressPyomoSolver(BasePyomoSolver):
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"""
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An InternalSolver that uses XPRESS and the Pyomo modeling language.
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Parameters
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----------
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params: dict
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Dictionary of options to pass to the Pyomo solver. For example,
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{"Threads": 4} to set the number of threads.
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"""
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def __init__(self, params: SolverParams = None) -> None:
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if params is None:
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params = {}
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if "randomseed" not in params.keys():
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params["randomseed"] = randint(low=0, high=1000).rvs()
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super().__init__(
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solver_factory=pe.SolverFactory("xpress_persistent"),
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params=params,
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)</code></pre>
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</details>
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</section>
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<section>
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</section>
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<section>
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</section>
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<section>
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</section>
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<section>
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<h2 class="section-title" id="header-classes">Classes</h2>
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<dl>
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<dt id="miplearn.solvers.pyomo.xpress.XpressPyomoSolver"><code class="flex name class">
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<span>class <span class="ident">XpressPyomoSolver</span></span>
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<span>(</span><span>params=None)</span>
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</code></dt>
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<dd>
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<section class="desc"><p>An InternalSolver that uses XPRESS and the Pyomo modeling language.</p>
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<h2 id="parameters">Parameters</h2>
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<dl>
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<dt><strong><code>params</code></strong> : <code>dict</code></dt>
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<dd>Dictionary of options to pass to the Pyomo solver. For example,
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{"Threads": 4} to set the number of threads.</dd>
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</dl></section>
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<details class="source">
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<summary>
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<span>Expand source code</span>
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</summary>
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<pre><code class="python">class XpressPyomoSolver(BasePyomoSolver):
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"""
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An InternalSolver that uses XPRESS and the Pyomo modeling language.
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Parameters
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----------
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params: dict
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Dictionary of options to pass to the Pyomo solver. For example,
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{"Threads": 4} to set the number of threads.
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"""
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def __init__(self, params: SolverParams = None) -> None:
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if params is None:
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params = {}
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if "randomseed" not in params.keys():
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params["randomseed"] = randint(low=0, high=1000).rvs()
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super().__init__(
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solver_factory=pe.SolverFactory("xpress_persistent"),
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params=params,
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)</code></pre>
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</details>
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<h3>Ancestors</h3>
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<ul class="hlist">
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<li><a title="miplearn.solvers.pyomo.base.BasePyomoSolver" href="base.html#miplearn.solvers.pyomo.base.BasePyomoSolver">BasePyomoSolver</a></li>
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<li><a title="miplearn.solvers.internal.InternalSolver" href="../internal.html#miplearn.solvers.internal.InternalSolver">InternalSolver</a></li>
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<li>abc.ABC</li>
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</ul>
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<h3>Inherited members</h3>
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<ul class="hlist">
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<li><code><b><a title="miplearn.solvers.pyomo.base.BasePyomoSolver" href="base.html#miplearn.solvers.pyomo.base.BasePyomoSolver">BasePyomoSolver</a></b></code>:
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<ul class="hlist">
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.add_constraint" href="../internal.html#miplearn.solvers.internal.InternalSolver.add_constraint">add_constraint</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.extract_constraint" href="../internal.html#miplearn.solvers.internal.InternalSolver.extract_constraint">extract_constraint</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.fix" href="../internal.html#miplearn.solvers.internal.InternalSolver.fix">fix</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.get_constraint_ids" href="../internal.html#miplearn.solvers.internal.InternalSolver.get_constraint_ids">get_constraint_ids</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.get_constraint_sense" href="../internal.html#miplearn.solvers.internal.InternalSolver.get_constraint_sense">get_constraint_sense</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.get_dual" href="../internal.html#miplearn.solvers.internal.InternalSolver.get_dual">get_dual</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.get_empty_solution" href="../internal.html#miplearn.solvers.internal.InternalSolver.get_empty_solution">get_empty_solution</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.get_inequality_slacks" href="../internal.html#miplearn.solvers.internal.InternalSolver.get_inequality_slacks">get_inequality_slacks</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.get_sense" href="../internal.html#miplearn.solvers.internal.InternalSolver.get_sense">get_sense</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.get_solution" href="../internal.html#miplearn.solvers.internal.InternalSolver.get_solution">get_solution</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.get_value" href="../internal.html#miplearn.solvers.internal.InternalSolver.get_value">get_value</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.is_constraint_satisfied" href="../internal.html#miplearn.solvers.internal.InternalSolver.is_constraint_satisfied">is_constraint_satisfied</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.is_infeasible" href="../internal.html#miplearn.solvers.internal.InternalSolver.is_infeasible">is_infeasible</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.relax" href="../internal.html#miplearn.solvers.internal.InternalSolver.relax">relax</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.set_branching_priorities" href="../internal.html#miplearn.solvers.internal.InternalSolver.set_branching_priorities">set_branching_priorities</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.set_constraint_sense" href="../internal.html#miplearn.solvers.internal.InternalSolver.set_constraint_sense">set_constraint_sense</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.set_instance" href="../internal.html#miplearn.solvers.internal.InternalSolver.set_instance">set_instance</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.set_warm_start" href="../internal.html#miplearn.solvers.internal.InternalSolver.set_warm_start">set_warm_start</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.solve" href="../internal.html#miplearn.solvers.internal.InternalSolver.solve">solve</a></code></li>
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<li><code><a title="miplearn.solvers.pyomo.base.BasePyomoSolver.solve_lp" href="../internal.html#miplearn.solvers.internal.InternalSolver.solve_lp">solve_lp</a></code></li>
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</ul>
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</li>
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</ul>
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</dd>
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</dl>
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</section>
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</article>
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<h1>Index</h1>
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<div class="toc">
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<ul></ul>
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</div>
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<ul id="index">
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<li><h3>Super-module</h3>
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<ul>
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<li><code><a title="miplearn.solvers.pyomo" href="index.html">miplearn.solvers.pyomo</a></code></li>
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</ul>
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</li>
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<li><h3><a href="#header-classes">Classes</a></h3>
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<ul>
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<li>
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<h4><code><a title="miplearn.solvers.pyomo.xpress.XpressPyomoSolver" href="#miplearn.solvers.pyomo.xpress.XpressPyomoSolver">XpressPyomoSolver</a></code></h4>
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