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filter.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>filter.py</title>
<link rel="stylesheet" href="../pycco.css">
</head>
<body>
<div id="background"></div>
<div id='container'>
<div class='section'>
<div class='docs'><h1>filter.py</h1></div>
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<div class='section' id='section-0'>
<div class='docs'>
<div class='octowrap'>
<a class='octothorpe' href='#section-0'>#</a>
</div>
<p>layer filter</p>
</div>
<div class='code'>
<div class="highlight"><pre></pre></div>
</div>
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<div class='section' id='section-1'>
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<div class='octowrap'>
<a class='octothorpe' href='#section-1'>#</a>
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<div class='code'>
<div class="highlight"><pre><span class="kn">import</span> <span class="nn">re</span></pre></div>
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<a class='octothorpe' href='#section-2'>#</a>
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<div class="highlight"><pre><span class="k">def</span> <span class="nf">filter_record</span><span class="p">(</span><span class="n">filt</span><span class="p">,</span> <span class="n">record</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">filt</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
<span class="k">if</span> <span class="s">'and'</span> <span class="ow">in</span> <span class="n">filt</span><span class="p">:</span>
<span class="n">res</span> <span class="o">=</span> <span class="bp">True</span>
<span class="k">for</span> <span class="n">sfilt</span> <span class="ow">in</span> <span class="n">filt</span><span class="p">[</span><span class="s">'and'</span><span class="p">]:</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">res</span> <span class="ow">and</span> <span class="n">filter_record</span><span class="p">(</span><span class="n">sfilt</span><span class="p">,</span> <span class="n">record</span><span class="p">)</span>
<span class="k">elif</span> <span class="s">'or'</span> <span class="ow">in</span> <span class="n">filt</span><span class="p">:</span>
<span class="n">res</span> <span class="o">=</span> <span class="bp">False</span>
<span class="k">for</span> <span class="n">sfilt</span> <span class="ow">in</span> <span class="n">filt</span><span class="p">[</span><span class="s">'or'</span><span class="p">]:</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">res</span> <span class="ow">or</span> <span class="n">filter_record</span><span class="p">(</span><span class="n">sfilt</span><span class="p">,</span> <span class="n">record</span><span class="p">)</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">filt</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">filter_single</span><span class="p">(</span><span class="n">filt</span><span class="p">,</span> <span class="n">record</span><span class="p">)</span>
<span class="k">return</span> <span class="n">res</span></pre></div>
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<div class='section' id='section-3'>
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<a class='octothorpe' href='#section-3'>#</a>
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<div class='code'>
<div class="highlight"><pre><span class="k">def</span> <span class="nf">filter_single</span><span class="p">(</span><span class="n">filt</span><span class="p">,</span> <span class="n">record</span><span class="p">):</span>
<span class="n">key</span><span class="p">,</span> <span class="n">comp</span><span class="p">,</span> <span class="n">val</span> <span class="o">=</span> <span class="n">filt</span>
<span class="n">prop</span> <span class="o">=</span> <span class="n">record</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
<span class="n">comp</span> <span class="o">=</span> <span class="n">comp</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">' '</span><span class="p">)</span>
<span class="k">if</span> <span class="s">'in'</span> <span class="ow">in</span> <span class="n">comp</span><span class="p">:</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">prop</span> <span class="ow">in</span> <span class="n">val</span>
<span class="k">elif</span> <span class="s">'like'</span> <span class="ow">in</span> <span class="n">comp</span><span class="p">:</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="s">'^'</span> <span class="o">+</span> <span class="n">_escape_regex</span><span class="p">(</span><span class="n">val</span><span class="p">)</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s">'%'</span><span class="p">,</span> <span class="s">'.*'</span><span class="p">)</span> <span class="o">+</span> <span class="s">'$'</span><span class="p">,</span> <span class="n">prop</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span>
<span class="k">elif</span> <span class="s">'matches'</span> <span class="ow">in</span> <span class="n">comp</span><span class="p">:</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="n">val</span><span class="p">,</span> <span class="n">prop</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span>
<span class="k">elif</span> <span class="s">'is'</span> <span class="ow">in</span> <span class="n">comp</span> <span class="ow">or</span> <span class="s">'='</span> <span class="ow">in</span> <span class="n">comp</span><span class="p">:</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">prop</span> <span class="o">==</span> <span class="n">val</span>
<span class="k">elif</span> <span class="s">'greater'</span> <span class="ow">in</span> <span class="n">comp</span> <span class="ow">or</span> <span class="p">(</span><span class="s">'>'</span> <span class="ow">in</span> <span class="n">comp</span><span class="p">):</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">prop</span> <span class="o">></span> <span class="n">val</span>
<span class="k">elif</span> <span class="s">'less'</span> <span class="ow">in</span> <span class="n">comp</span> <span class="ow">or</span> <span class="s">'<'</span> <span class="ow">in</span> <span class="n">comp</span><span class="p">:</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">prop</span> <span class="o"><</span> <span class="n">val</span>
<span class="k">if</span> <span class="s">'not'</span> <span class="ow">in</span> <span class="n">comp</span><span class="p">:</span>
<span class="k">return</span> <span class="ow">not</span> <span class="n">res</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="n">res</span></pre></div>
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<div class='clearall'></div>
<div class='section' id='section-4'>
<div class='docs'>
<div class='octowrap'>
<a class='octothorpe' href='#section-4'>#</a>
</div>
</div>
<div class='code'>
<div class="highlight"><pre><span class="k">def</span> <span class="nf">_escape_regex</span><span class="p">(</span><span class="n">s</span><span class="p">):</span>
<span class="n">chars</span> <span class="o">=</span> <span class="p">(</span><span class="s">'.'</span><span class="p">,</span> <span class="s">'*'</span><span class="p">,</span> <span class="s">'?'</span><span class="p">,</span> <span class="s">'+'</span><span class="p">,</span> <span class="s">'('</span><span class="p">,</span> <span class="s">')'</span><span class="p">,</span> <span class="s">'['</span><span class="p">,</span> <span class="s">']'</span><span class="p">,</span> <span class="s">'-'</span><span class="p">)</span>
<span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">chars</span><span class="p">:</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">s</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="s">'</span><span class="se">\\</span><span class="s">'</span> <span class="o">+</span> <span class="n">c</span><span class="p">)</span>
<span class="k">return</span> <span class="n">s</span>
</pre></div>
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