/apidocs/echonest.sorting-pysrc.html
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1<?xml version="1.0" encoding="ascii"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 3 "DTD/xhtml1-transitional.dtd"> 4<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> 5<head> 6 <title>echonest.sorting</title> 7 <link rel="stylesheet" href="epydoc.css" type="text/css" /> 8 <script type="text/javascript" src="epydoc.js"></script> 9</head> 10 11<body bgcolor="white" text="black" link="blue" vlink="#204080" 12 alink="#204080"> 13<!-- ==================== NAVIGATION BAR ==================== --> 14<table class="navbar" border="0" width="100%" cellpadding="0" 15 bgcolor="#a0c0ff" cellspacing="0"> 16 <tr valign="middle"> 17 18 <!-- Tree link --> 19 <th> <a 20 href="module-tree.html">Trees</a> </th> 21 22 <!-- Index link --> 23 <th> <a 24 href="identifier-index.html">Indices</a> </th> 25 26 <!-- Help link --> 27 <th> <a 28 href="help.html">Help</a> </th> 29 30 <!-- Project homepage --> 31 <th class="navbar" align="right" width="100%"> 32 <table border="0" cellpadding="0" cellspacing="0"> 33 <tr><th class="navbar" align="center" 34 ><a class="navbar" target="_top" href="http://code.google.com/p/echo-nest-remix/">Project Homepage</a></th> 35 </tr></table></th> 36 </tr> 37</table> 38<table width="100%" cellpadding="0" cellspacing="0"> 39 <tr valign="top"> 40 <td width="100%"> 41 <span class="breadcrumbs"> 42 <a href="echonest-module.html">Package echonest</a> :: 43 Module sorting 44 </span> 45 </td> 46 <td> 47 <table cellpadding="0" cellspacing="0"> 48 <!-- hide/show private --> 49 <tr><td align="right"><span class="options">[<a href="javascript:void(0);" class="privatelink" 50 onclick="toggle_private();">hide private</a>]</span></td></tr> 51 <tr><td align="right"><span class="options" 52 >[<a href="frames.html" target="_top">frames</a 53 >] | <a href="echonest.sorting-pysrc.html" 54 target="_top">no frames</a>]</span></td></tr> 55 </table> 56 </td> 57 </tr> 58</table> 59<h1 class="epydoc">Source Code for <a href="echonest.sorting-module.html">Module echonest.sorting</a></h1> 60<pre class="py-src"> 61<a name="L1"></a><tt class="py-lineno"> 1</tt> <tt class="py-line"><tt class="py-docstring">"""</tt> </tt> 62<a name="L2"></a><tt class="py-lineno"> 2</tt> <tt class="py-line"><tt class="py-docstring">Sorting key functions as utilities for `echonest.audio`.</tt> </tt> 63<a name="L3"></a><tt class="py-lineno"> 3</tt> <tt class="py-line"><tt class="py-docstring"></tt> </tt> 64<a name="L4"></a><tt class="py-lineno"> 4</tt> <tt class="py-line"><tt class="py-docstring">For convenience, intended to be imported as::</tt> </tt> 65<a name="L5"></a><tt class="py-lineno"> 5</tt> <tt class="py-line"><tt class="py-docstring"></tt> </tt> 66<a name="L6"></a><tt class="py-lineno"> 6</tt> <tt class="py-line"><tt class="py-docstring"> from audio.sorting import *</tt> </tt> 67<a name="L7"></a><tt class="py-lineno"> 7</tt> <tt class="py-line"><tt class="py-docstring"></tt> </tt> 68<a name="L8"></a><tt class="py-lineno"> 8</tt> <tt class="py-line"><tt class="py-docstring">All of the functions in this module can be used as a sorting key for</tt> </tt> 69<a name="L9"></a><tt class="py-lineno"> 9</tt> <tt class="py-line"><tt class="py-docstring">`AudioQuantumList.ordered_by`, as in::</tt> </tt> 70<a name="L10"></a><tt class="py-lineno">10</tt> <tt class="py-line"><tt class="py-docstring"></tt> </tt> 71<a name="L11"></a><tt class="py-lineno">11</tt> <tt class="py-line"><tt class="py-docstring"> analysis.segments.ordered_by(duration)</tt> </tt> 72<a name="L12"></a><tt class="py-lineno">12</tt> <tt class="py-line"><tt class="py-docstring"></tt> </tt> 73<a name="L13"></a><tt class="py-lineno">13</tt> <tt class="py-line"><tt class="py-docstring">Some of the functions in this module return *another* function that takes </tt> </tt> 74<a name="L14"></a><tt class="py-lineno">14</tt> <tt class="py-line"><tt class="py-docstring">one argument, an `AudioQuantum`, and returns a value (typically a `float`)</tt> </tt> 75<a name="L15"></a><tt class="py-lineno">15</tt> <tt class="py-line"><tt class="py-docstring">that can then be used as a sorting value.</tt> </tt> 76<a name="L16"></a><tt class="py-lineno">16</tt> <tt class="py-line"><tt class="py-docstring"></tt> </tt> 77<a name="L17"></a><tt class="py-lineno">17</tt> <tt class="py-line"><tt class="py-docstring">By convention, all of these functions are named to be noun phrases that </tt> </tt> 78<a name="L18"></a><tt class="py-lineno">18</tt> <tt class="py-line"><tt class="py-docstring">follow `sorted_by`, as seen above.</tt> </tt> 79<a name="L19"></a><tt class="py-lineno">19</tt> <tt class="py-line"><tt class="py-docstring">"""</tt> </tt> 80<a name="L20"></a><tt class="py-lineno">20</tt> <tt class="py-line"> </tt> 81<a name="confidence"></a><div id="confidence-def"><a name="L21"></a><tt class="py-lineno">21</tt> <a class="py-toggle" href="#" id="confidence-toggle" onclick="return toggle('confidence');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="echonest.sorting-module.html#confidence">confidence</a><tt class="py-op">(</tt><tt class="py-param">x</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt> 82</div><a name="L22"></a><tt class="py-lineno">22</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt> 83<a name="L23"></a><tt class="py-lineno">23</tt> <tt class="py-line"><tt class="py-docstring"> Returns the `AudioQuantum`\'s `confidence` as a sorting value.</tt> </tt> 84<a name="L24"></a><tt class="py-lineno">24</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt> 85<a name="L25"></a><tt class="py-lineno">25</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">x</tt><tt class="py-op">.</tt><tt id="link-0" class="py-name" targets="Variable echonest.audio.AudioQuantumList.confidence=echonest.audio.AudioQuantumList-class.html#confidence,Function echonest.sorting.confidence()=echonest.sorting-module.html#confidence"><a title="echonest.audio.AudioQuantumList.confidence 86echonest.sorting.confidence" class="py-name" href="#" onclick="return doclink('link-0', 'confidence', 'link-0');">confidence</a></tt> </tt> 87</div><a name="L26"></a><tt class="py-lineno">26</tt> <tt class="py-line"> </tt> 88<a name="duration"></a><div id="duration-def"><a name="L27"></a><tt class="py-lineno">27</tt> <a class="py-toggle" href="#" id="duration-toggle" onclick="return toggle('duration');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="echonest.sorting-module.html#duration">duration</a><tt class="py-op">(</tt><tt class="py-param">x</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt> 89</div><a name="L28"></a><tt class="py-lineno">28</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt> 90<a name="L29"></a><tt class="py-lineno">29</tt> <tt class="py-line"><tt class="py-docstring"> Returns the `AudioQuantum`\'s `duration` as a sorting value.</tt> </tt> 91<a name="L30"></a><tt class="py-lineno">30</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt> 92<a name="L31"></a><tt class="py-lineno">31</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">x</tt><tt class="py-op">.</tt><tt id="link-1" class="py-name" targets="Variable echonest.audio.AudioData.duration=echonest.audio.AudioData-class.html#duration,Variable echonest.audio.AudioQuantumList.duration=echonest.audio.AudioQuantumList-class.html#duration,Variable echonest.audio.LocalAudioFile.duration=echonest.audio.LocalAudioFile-class.html#duration,Variable echonest.audio.ModifiedRenderable.duration=echonest.audio.ModifiedRenderable-class.html#duration,Variable echonest.audio.Simultaneous.duration=echonest.audio.Simultaneous-class.html#duration,Method echonest.audio.TimeTruncateFactor.duration()=echonest.audio.TimeTruncateFactor-class.html#duration,Method echonest.audio.TimeTruncateLength.duration()=echonest.audio.TimeTruncateLength-class.html#duration,Function echonest.sorting.duration()=echonest.sorting-module.html#duration,Method echonest.video.ImageSequence.duration()=echonest.video.ImageSequence-class.html#duration"><a title="echonest.audio.AudioData.duration 93echonest.audio.AudioQuantumList.duration 94echonest.audio.LocalAudioFile.duration 95echonest.audio.ModifiedRenderable.duration 96echonest.audio.Simultaneous.duration 97echonest.audio.TimeTruncateFactor.duration 98echonest.audio.TimeTruncateLength.duration 99echonest.sorting.duration 100echonest.video.ImageSequence.duration" class="py-name" href="#" onclick="return doclink('link-1', 'duration', 'link-1');">duration</a></tt> </tt> 101</div><a name="L32"></a><tt class="py-lineno">32</tt> <tt class="py-line"> </tt> 102<a name="timbre_value"></a><div id="timbre_value-def"><a name="L33"></a><tt class="py-lineno">33</tt> <a class="py-toggle" href="#" id="timbre_value-toggle" onclick="return toggle('timbre_value');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="echonest.sorting-module.html#timbre_value">timbre_value</a><tt class="py-op">(</tt><tt class="py-param">index</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt> 103</div><div id="timbre_value-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="timbre_value-expanded"><a name="L34"></a><tt class="py-lineno">34</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt> 104<a name="L35"></a><tt class="py-lineno">35</tt> <tt class="py-line"><tt class="py-docstring"> Returns a function that returns the value of `timbre`\[*index*]</tt> </tt> 105<a name="L36"></a><tt class="py-lineno">36</tt> <tt class="py-line"><tt class="py-docstring"> of its input `AudioQuantum`. Sorts by the values of the *index*-th </tt> </tt> 106<a name="L37"></a><tt class="py-lineno">37</tt> <tt class="py-line"><tt class="py-docstring"> value in the timbre vector.</tt> </tt> 107<a name="L38"></a><tt class="py-lineno">38</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt> 108<a name="L39"></a><tt class="py-lineno">39</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-keyword">lambda</tt> <tt class="py-name">x</tt><tt class="py-op">:</tt> <tt class="py-name">x</tt><tt class="py-op">.</tt><tt id="link-2" class="py-name" targets="Variable echonest.audio.AudioQuantumList.timbre=echonest.audio.AudioQuantumList-class.html#timbre"><a title="echonest.audio.AudioQuantumList.timbre" class="py-name" href="#" onclick="return doclink('link-2', 'timbre', 'link-2');">timbre</a></tt><tt class="py-op">[</tt><tt class="py-name">index</tt><tt class="py-op">]</tt> </tt> 109</div><a name="L40"></a><tt class="py-lineno">40</tt> <tt class="py-line"> </tt> 110<a name="pitch_value"></a><div id="pitch_value-def"><a name="L41"></a><tt class="py-lineno">41</tt> <a class="py-toggle" href="#" id="pitch_value-toggle" onclick="return toggle('pitch_value');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="echonest.sorting-module.html#pitch_value">pitch_value</a><tt class="py-op">(</tt><tt class="py-param">index</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt> 111</div><div id="pitch_value-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="pitch_value-expanded"><a name="L42"></a><tt class="py-lineno">42</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt> 112<a name="L43"></a><tt class="py-lineno">43</tt> <tt class="py-line"><tt class="py-docstring"> Returns a function that returns the value of `pitch`\[*index*]</tt> </tt> 113<a name="L44"></a><tt class="py-lineno">44</tt> <tt class="py-line"><tt class="py-docstring"> of its input `AudioQuantum`. Sorts by the values of the *index*-th </tt> </tt> 114<a name="L45"></a><tt class="py-lineno">45</tt> <tt class="py-line"><tt class="py-docstring"> value in the pitch vector.</tt> </tt> 115<a name="L46"></a><tt class="py-lineno">46</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt> 116<a name="L47"></a><tt class="py-lineno">47</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-keyword">lambda</tt> <tt class="py-name">x</tt><tt class="py-op">:</tt> <tt class="py-name">x</tt><tt class="py-op">.</tt><tt id="link-3" class="py-name" targets="Variable echonest.audio.AudioQuantumList.pitches=echonest.audio.AudioQuantumList-class.html#pitches"><a title="echonest.audio.AudioQuantumList.pitches" class="py-name" href="#" onclick="return doclink('link-3', 'pitches', 'link-3');">pitches</a></tt><tt class="py-op">[</tt><tt class="py-name">index</tt><tt class="py-op">]</tt> </tt> 117</div><a name="L48"></a><tt class="py-lineno">48</tt> <tt class="py-line"> </tt> 118<a name="pitch_distance_from"></a><div id="pitch_distance_from-def"><a name="L49"></a><tt class="py-lineno">49</tt> <a class="py-toggle" href="#" id="pitch_distance_from-toggle" onclick="return toggle('pitch_distance_from');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="echonest.sorting-module.html#pitch_distance_from">pitch_distance_from</a><tt class="py-op">(</tt><tt class="py-param">seg</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt> 119</div><div id="pitch_distance_from-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="pitch_distance_from-expanded"><a name="L50"></a><tt class="py-lineno">50</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt> 120<a name="L51"></a><tt class="py-lineno">51</tt> <tt class="py-line"><tt class="py-docstring"> Returns a function that returns the sum of the squared differences</tt> </tt> 121<a name="L52"></a><tt class="py-lineno">52</tt> <tt class="py-line"><tt class="py-docstring"> between the `pitch` vector of its input `AudioQuantum` and the `pitch` </tt> </tt> 122<a name="L53"></a><tt class="py-lineno">53</tt> <tt class="py-line"><tt class="py-docstring"> vector of the reference parameter *seg*. Sorts by the pitch distance </tt> </tt> 123<a name="L54"></a><tt class="py-lineno">54</tt> <tt class="py-line"><tt class="py-docstring"> from the reference `AudioSegment`.</tt> </tt> 124<a name="L55"></a><tt class="py-lineno">55</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt> 125<a name="L56"></a><tt class="py-lineno">56</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-keyword">lambda</tt> <tt class="py-name">x</tt><tt class="py-op">:</tt> <tt id="link-4" class="py-name" targets="Method echonest.audio.AudioData.sum()=echonest.audio.AudioData-class.html#sum"><a title="echonest.audio.AudioData.sum" class="py-name" href="#" onclick="return doclink('link-4', 'sum', 'link-4');">sum</a></tt><tt class="py-op">(</tt><tt class="py-name">map</tt><tt class="py-op">(</tt><tt id="link-5" class="py-name" targets="Function echonest.sorting._diff_squared()=echonest.sorting-module.html#_diff_squared"><a title="echonest.sorting._diff_squared" class="py-name" href="#" onclick="return doclink('link-5', '_diff_squared', 'link-5');">_diff_squared</a></tt><tt class="py-op">,</tt> <tt class="py-name">seg</tt><tt class="py-op">.</tt><tt id="link-6" class="py-name"><a title="echonest.audio.AudioQuantumList.pitches" class="py-name" href="#" onclick="return doclink('link-6', 'pitches', 'link-3');">pitches</a></tt><tt class="py-op">,</tt> <tt class="py-name">x</tt><tt class="py-op">.</tt><tt id="link-7" class="py-name"><a title="echonest.audio.AudioQuantumList.pitches" class="py-name" href="#" onclick="return doclink('link-7', 'pitches', 'link-3');">pitches</a></tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt> 126</div><a name="L57"></a><tt class="py-lineno">57</tt> <tt class="py-line"> </tt> 127<a name="timbre_distance_from"></a><div id="timbre_distance_from-def"><a name="L58"></a><tt class="py-lineno">58</tt> <a class="py-toggle" href="#" id="timbre_distance_from-toggle" onclick="return toggle('timbre_distance_from');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="echonest.sorting-module.html#timbre_distance_from">timbre_distance_from</a><tt class="py-op">(</tt><tt class="py-param">seg</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt> 128</div><div id="timbre_distance_from-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="timbre_distance_from-expanded"><a name="L59"></a><tt class="py-lineno">59</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt> 129<a name="L60"></a><tt class="py-lineno">60</tt> <tt class="py-line"><tt class="py-docstring"> Returns a function that returns the sum of the squared differences </tt> </tt> 130<a name="L61"></a><tt class="py-lineno">61</tt> <tt class="py-line"><tt class="py-docstring"> between the `pitch` vector of its input `AudioQuantum` and the `pitch` </tt> </tt> 131<a name="L62"></a><tt class="py-lineno">62</tt> <tt class="py-line"><tt class="py-docstring"> vector of the reference parameter *seg*. Sorts by the pitch distance </tt> </tt> 132<a name="L63"></a><tt class="py-lineno">63</tt> <tt class="py-line"><tt class="py-docstring"> from the reference `AudioSegment`.</tt> </tt> 133<a name="L64"></a><tt class="py-lineno">64</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt> 134<a name="L65"></a><tt class="py-lineno">65</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-keyword">lambda</tt> <tt class="py-name">x</tt><tt class="py-op">:</tt> <tt id="link-8" class="py-name"><a title="echonest.audio.AudioData.sum" class="py-name" href="#" onclick="return doclink('link-8', 'sum', 'link-4');">sum</a></tt><tt class="py-op">(</tt><tt class="py-name">map</tt><tt class="py-op">(</tt><tt id="link-9" class="py-name"><a title="echonest.sorting._diff_squared" class="py-name" href="#" onclick="return doclink('link-9', '_diff_squared', 'link-5');">_diff_squared</a></tt><tt class="py-op">,</tt> <tt class="py-name">seg</tt><tt class="py-op">.</tt><tt id="link-10" class="py-name"><a title="echonest.audio.AudioQuantumList.timbre" class="py-name" href="#" onclick="return doclink('link-10', 'timbre', 'link-2');">timbre</a></tt><tt class="py-op">,</tt> <tt class="py-name">x</tt><tt class="py-op">.</tt><tt id="link-11" class="py-name"><a title="echonest.audio.AudioQuantumList.timbre" class="py-name" href="#" onclick="return doclink('link-11', 'timbre', 'link-2');">timbre</a></tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt> 135</div><a name="L66"></a><tt class="py-lineno">66</tt> <tt class="py-line"> </tt> 136<a name="noisiness"></a><div id="noisiness-def"><a name="L67"></a><tt class="py-lineno">67</tt> <a class="py-toggle" href="#" id="noisiness-toggle" onclick="return toggle('noisiness');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="echonest.sorting-module.html#noisiness">noisiness</a><tt class="py-op">(</tt><tt class="py-param">x</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt> 137</div><div id="noisiness-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="noisiness-expanded"><a name="L68"></a><tt class="py-lineno">68</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt> 138<a name="L69"></a><tt class="py-lineno">69</tt> <tt class="py-line"><tt class="py-docstring"> Returns the sum of the twelve pitch vectors' elements. This is a very</tt> </tt> 139<a name="L70"></a><tt class="py-lineno">70</tt> <tt class="py-line"><tt class="py-docstring"> fast way of judging the relative noisiness of a segment.</tt> </tt> 140<a name="L71"></a><tt class="py-lineno">71</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt> 141<a name="L72"></a><tt class="py-lineno">72</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt id="link-12" class="py-name"><a title="echonest.audio.AudioData.sum" class="py-name" href="#" onclick="return doclink('link-12', 'sum', 'link-4');">sum</a></tt><tt class="py-op">(</tt><tt class="py-name">x</tt><tt class="py-op">.</tt><tt id="link-13" class="py-name"><a title="echonest.audio.AudioQuantumList.pitches" class="py-name" href="#" onclick="return doclink('link-13', 'pitches', 'link-3');">pitches</a></tt><tt class="py-op">)</tt> </tt> 142</div><a name="L73"></a><tt class="py-lineno">73</tt> <tt class="py-line"> </tt> 143<a name="L74"></a><tt class="py-lineno">74</tt> <tt class="py-line"><tt class="py-comment"># local helper functions:</tt> </tt> 144<a name="_diff_squared"></a><div id="_diff_squared-def"><a name="L75"></a><tt class="py-lineno">75</tt> <a class="py-toggle" href="#" id="_diff_squared-toggle" onclick="return toggle('_diff_squared');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="echonest.sorting-module.html#_diff_squared">_diff_squared</a><tt class="py-op">(</tt><tt class="py-param">a</tt><tt class="py-op">,</tt> <tt class="py-param">b</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt> 145</div><div id="_diff_squared-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="_diff_squared-expanded"><a name="L76"></a><tt class="py-lineno">76</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt> 146<a name="L77"></a><tt class="py-lineno">77</tt> <tt class="py-line"><tt class="py-docstring"> Local helper function. The square of the difference between a and b.</tt> </tt> 147<a name="L78"></a><tt class="py-lineno">78</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt> 148<a name="L79"></a><tt class="py-lineno">79</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">pow</tt><tt class="py-op">(</tt><tt class="py-name">a</tt><tt class="py-op">-</tt><tt class="py-name">b</tt><tt class="py-op">,</tt> <tt class="py-number">2</tt><tt class="py-op">)</tt> </tt> 149</div><a name="L80"></a><tt class="py-lineno">80</tt> <tt class="py-line"> </tt><script type="text/javascript"> 150<!-- 151expandto(location.href); 152// --> 153</script> 154</pre> 155<br /> 156<!-- ==================== NAVIGATION BAR ==================== --> 157<table class="navbar" border="0" width="100%" cellpadding="0" 158 bgcolor="#a0c0ff" cellspacing="0"> 159 <tr valign="middle"> 160 161 <!-- Tree link --> 162 <th> <a 163 href="module-tree.html">Trees</a> </th> 164 165 <!-- Index link --> 166 <th> <a 167 href="identifier-index.html">Indices</a> </th> 168 169 <!-- Help link --> 170 <th> <a 171 href="help.html">Help</a> </th> 172 173 <!-- Project homepage --> 174 <th class="navbar" align="right" width="100%"> 175 <table border="0" cellpadding="0" cellspacing="0"> 176 <tr><th class="navbar" align="center" 177 ><a class="navbar" target="_top" href="http://code.google.com/p/echo-nest-remix/">Project Homepage</a></th> 178 </tr></table></th> 179 </tr> 180</table> 181<table border="0" cellpadding="0" cellspacing="0" width="100%%"> 182 <tr> 183 <td align="left" class="footer"> 184 Generated by Epydoc 3.0.1 on Wed Sep 1 16:09:00 2010 185 </td> 186 <td align="right" class="footer"> 187 <a target="mainFrame" href="http://epydoc.sourceforge.net" 188 >http://epydoc.sourceforge.net</a> 189 </td> 190 </tr> 191</table> 192 193<script type="text/javascript"> 194 <!-- 195 // Private objects are initially displayed (because if 196 // javascript is turned off then we want them to be 197 // visible); but by default, we want to hide them. 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