<?xml version="1.0" encoding="ascii"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Bio.GA.Crossover.General.SafeFitnessCrossover</title> <link rel="stylesheet" href="epydoc.css" type="text/css" /> <script type="text/javascript" src="epydoc.js"></script> </head> <body bgcolor="white" text="black" link="blue" vlink="#204080" alink="#204080"> <!-- ==================== NAVIGATION BAR ==================== --> <table class="navbar" border="0" width="100%" cellpadding="0" bgcolor="#a0c0ff" cellspacing="0"> <tr valign="middle"> <!-- Tree link --> <th> <a href="module-tree.html">Trees</a> </th> <!-- Index link --> <th> <a href="identifier-index.html">Indices</a> </th> <!-- Help link --> <th> <a href="help.html">Help</a> </th> <th class="navbar" width="100%"></th> </tr> </table> <table width="100%" cellpadding="0" cellspacing="0"> <tr valign="top"> <td width="100%"> <span class="breadcrumbs"> <a href="Bio-module.html">Package Bio</a> :: <a href="Bio.GA-module.html">Package GA</a> :: <a href="Bio.GA.Crossover-module.html">Package Crossover</a> :: <a href="Bio.GA.Crossover.General-module.html">Module General</a> :: Class SafeFitnessCrossover </span> </td> <td> <table cellpadding="0" cellspacing="0"> <!-- hide/show private --> <tr><td align="right"><span class="options">[<a href="javascript:void(0);" class="privatelink" onclick="toggle_private();">hide private</a>]</span></td></tr> <tr><td align="right"><span class="options" >[<a href="frames.html" target="_top">frames</a >] | <a href="Bio.GA.Crossover.General.SafeFitnessCrossover-class.html" target="_top">no frames</a>]</span></td></tr> </table> </td> </tr> </table> <!-- ==================== CLASS DESCRIPTION ==================== --> <h1 class="epydoc">Class SafeFitnessCrossover</h1><p class="nomargin-top"><span class="codelink"><a href="Bio.GA.Crossover.General-pysrc.html#SafeFitnessCrossover">source code</a></span></p> <p>Perform crossovers, but do not allow decreases in organism fitness.</p> <p>This doesn't actually do any crossover work, but instead relies on another class to do the crossover and just checks that newly created organisms do not have less fitness. This is useful for cases where crossovers can</p> <!-- ==================== INSTANCE METHODS ==================== --> <a name="section-InstanceMethods"></a> <table class="summary" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr bgcolor="#70b0f0" class="table-header"> <td colspan="2" class="table-header"> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr valign="top"> <td align="left"><span class="table-header">Instance Methods</span></td> <td align="right" valign="top" ><span class="options">[<a href="#section-InstanceMethods" class="privatelink" onclick="toggle_private();" >hide private</a>]</span></td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a href="Bio.GA.Crossover.General.SafeFitnessCrossover-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">actual_crossover</span>, <span class="summary-sig-arg">accept_less</span>=<span class="summary-sig-default">0.0</span>)</span><br /> Initialize to do safe crossovers.</td> <td align="right" valign="top"> <span class="codelink"><a href="Bio.GA.Crossover.General-pysrc.html#SafeFitnessCrossover.__init__">source code</a></span> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="do_crossover"></a><span class="summary-sig-name">do_crossover</span>(<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 /> Perform a safe crossover between the two organism.</td> <td align="right" valign="top"> <span class="codelink"><a href="Bio.GA.Crossover.General-pysrc.html#SafeFitnessCrossover.do_crossover">source code</a></span> </td> </tr> </table> </td> </tr> </table> <!-- ==================== METHOD DETAILS ==================== --> <a name="section-MethodDetails"></a> <table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr bgcolor="#70b0f0" class="table-header"> <td colspan="2" class="table-header"> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr valign="top"> <td align="left"><span class="table-header">Method Details</span></td> <td align="right" valign="top" ><span class="options">[<a href="#section-MethodDetails" class="privatelink" onclick="toggle_private();" >hide private</a>]</span></td> </tr> </table> </td> </tr> </table> <a name="__init__"></a> <div> <table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr><td> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr valign="top"><td> <h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>, <span class="sig-arg">actual_crossover</span>, <span class="sig-arg">accept_less</span>=<span class="sig-default">0.0</span>)</span> <br /><em class="fname">(Constructor)</em> </h3> </td><td align="right" valign="top" ><span class="codelink"><a href="Bio.GA.Crossover.General-pysrc.html#SafeFitnessCrossover.__init__">source code</a></span> </td> </tr></table> <p>Initialize to do safe crossovers.</p> <p>Arguments:</p> <p>o actual_crossover - A Crossover class which actually implements crossover functionality.</p> <p>o accept_less - A probability to accept crossovers which generate less fitness. This allows you to accept some crossovers which reduce fitness, but not all of them.</p> <dl class="fields"> </dl> </td></tr></table> </div> <br /> <!-- ==================== NAVIGATION BAR ==================== --> <table class="navbar" border="0" width="100%" cellpadding="0" bgcolor="#a0c0ff" cellspacing="0"> <tr valign="middle"> <!-- Tree link --> <th> <a href="module-tree.html">Trees</a> </th> <!-- Index link --> <th> <a href="identifier-index.html">Indices</a> </th> <!-- Help link --> <th> <a href="help.html">Help</a> </th> <th class="navbar" width="100%"></th> </tr> </table> <table border="0" cellpadding="0" cellspacing="0" width="100%%"> <tr> <td align="left" class="footer"> Generated by Epydoc 3.0.1 on Mon Sep 15 09:26:34 2008 </td> <td align="right" class="footer"> <a target="mainFrame" href="http://epydoc.sourceforge.net" >http://epydoc.sourceforge.net</a> </td> </tr> </table> <script type="text/javascript"> <!-- // Private objects are initially displayed (because if // javascript is turned off then we want them to be // visible); but by default, we want to hide them. 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