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<a href="Bio-module.html">Package Bio</a> ::
<a href="Bio.GA-module.html">Package GA</a> ::
<a href="Bio.GA.Selection-module.html">Package Selection</a> ::
<a href="Bio.GA.Selection.Tournament-module.html">Module Tournament</a> ::
Class TournamentSelection
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class TournamentSelection</h1><p class="nomargin-top"><span class="codelink"><a href="Bio.GA.Selection.Tournament-pysrc.html#TournamentSelection">source code</a></span></p>
<pre class="base-tree">
<a href="Bio.GA.Selection.Abstract.AbstractSelection-class.html">Abstract.AbstractSelection</a> --+
|
<strong class="uidshort">TournamentSelection</strong>
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<p>Implement tournament style selection.</p>
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<td><span class="summary-sig"><a href="Bio.GA.Selection.Tournament.TournamentSelection-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">mutator</span>,
<span class="summary-sig-arg">crossover</span>,
<span class="summary-sig-arg">repairer</span>,
<span class="summary-sig-arg">num_competitors</span>=<span class="summary-sig-default">2</span>)</span><br />
Initialize the tournament selector.</td>
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<span class="codelink"><a href="Bio.GA.Selection.Tournament-pysrc.html#TournamentSelection.__init__">source code</a></span>
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<td><span class="summary-sig"><a href="Bio.GA.Selection.Tournament.TournamentSelection-class.html#_fitness_cmp" class="summary-sig-name" onclick="show_private();">_fitness_cmp</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">org_1</span>,
<span class="summary-sig-arg">org_2</span>)</span><br />
Comparison function for comparing two organisms.</td>
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<span class="codelink"><a href="Bio.GA.Selection.Tournament-pysrc.html#TournamentSelection._fitness_cmp">source code</a></span>
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<td><span class="summary-sig"><a href="Bio.GA.Selection.Tournament.TournamentSelection-class.html#select" class="summary-sig-name">select</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">population</span>)</span><br />
Perform selection on the population using the Tournament model.</td>
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<span class="codelink"><a href="Bio.GA.Selection.Tournament-pysrc.html#TournamentSelection.select">source code</a></span>
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<p class="indent-wrapped-lines"><b>Inherited from <code><a href="Bio.GA.Selection.Abstract.AbstractSelection-class.html">Abstract.AbstractSelection</a></code></b>:
<code><a href="Bio.GA.Selection.Abstract.AbstractSelection-class.html#mutate_and_crossover">mutate_and_crossover</a></code>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">mutator</span>,
<span class="sig-arg">crossover</span>,
<span class="sig-arg">repairer</span>,
<span class="sig-arg">num_competitors</span>=<span class="sig-default">2</span>)</span>
<br /><em class="fname">(Constructor)</em>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="Bio.GA.Selection.Tournament-pysrc.html#TournamentSelection.__init__">source code</a></span>
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<p>Initialize the tournament selector.</p>
<p>Arguments:</p>
<p>o num_competitors-- The number of individiuals that should be involved
in a selection round. By default we just have two individuals (head to
head!).</p>
<p>See AbstractSelection for a description of the arguments to the
initializer.</p>
<dl class="fields">
<dt>Overrides:
<a href="Bio.GA.Selection.Abstract.AbstractSelection-class.html#__init__">Abstract.AbstractSelection.__init__</a>
</dt>
</dl>
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<a name="_fitness_cmp"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">_fitness_cmp</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">org_1</span>,
<span class="sig-arg">org_2</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="Bio.GA.Selection.Tournament-pysrc.html#TournamentSelection._fitness_cmp">source code</a></span>
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<p>Comparison function for comparing two organisms.</p>
<p>This just allows us to easily sort organisms by fitness.</p>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">select</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">population</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="Bio.GA.Selection.Tournament-pysrc.html#TournamentSelection.select">source code</a></span>
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<p>Perform selection on the population using the Tournament model.</p>
<p>Arguments:</p>
<p>o population -- A population of organisms on which we will perform
selection. The individuals are assumed to have fitness values which are
due to their current genome (ie. the fitness is up to date).</p>
<dl class="fields">
<dt>Overrides:
<a href="Bio.GA.Selection.Abstract.AbstractSelection-class.html#select">Abstract.AbstractSelection.select</a>
</dt>
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