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30.19
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<h1>Source code for pylorax.api.bisect</h1><div class="highlight"><pre>
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<span></span><span class="c1">#</span>
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<span class="c1"># Copyright (C) 2018 Red Hat, Inc.</span>
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<span class="c1">#</span>
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<span class="c1"># This program is free software; you can redistribute it and/or modify</span>
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<span class="c1"># it under the terms of the GNU General Public License as published by</span>
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<span class="c1"># the Free Software Foundation; either version 2 of the License, or</span>
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<span class="c1"># (at your option) any later version.</span>
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<span class="c1">#</span>
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<span class="c1"># This program is distributed in the hope that it will be useful,</span>
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<span class="c1"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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<span class="c1"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
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<span class="c1"># GNU General Public License for more details.</span>
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<span class="c1">#</span>
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<span class="c1"># You should have received a copy of the GNU General Public License</span>
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<span class="c1"># along with this program. If not, see <http://www.gnu.org/licenses/>.</span>
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<span class="c1">#</span>
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<div class="viewcode-block" id="insort_left"><a class="viewcode-back" href="../../../pylorax.api.html#pylorax.api.bisect.insort_left">[docs]</a><span class="k">def</span> <span class="nf">insort_left</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">x</span><span class="p">,</span> <span class="n">key</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">lo</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">hi</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
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<span class="sd">"""Insert item x in list a, and keep it sorted assuming a is sorted.</span>
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<span class="sd"> :param a: sorted list</span>
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<span class="sd"> :type a: list</span>
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<span class="sd"> :param x: item to insert into the list</span>
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<span class="sd"> :type x: object</span>
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<span class="sd"> :param key: Function to use to compare items in the list</span>
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<span class="sd"> :type key: function</span>
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<span class="sd"> :returns: index where the item was inserted</span>
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<span class="sd"> :rtype: int</span>
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<span class="sd"> If x is already in a, insert it to the left of the leftmost x.</span>
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<span class="sd"> Optional args lo (default 0) and hi (default len(a)) bound the</span>
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<span class="sd"> slice of a to be searched.</span>
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<span class="sd"> This is a modified version of bisect.insort_left that can use a</span>
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<span class="sd"> function for the compare, and returns the index position where it</span>
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<span class="sd"> was inserted.</span>
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<span class="sd"> """</span>
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<span class="k">if</span> <span class="n">key</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
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<span class="n">key</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">i</span><span class="p">:</span> <span class="n">i</span>
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<span class="k">if</span> <span class="n">lo</span> <span class="o"><</span> <span class="mi">0</span><span class="p">:</span>
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<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'lo must be non-negative'</span><span class="p">)</span>
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<span class="k">if</span> <span class="n">hi</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
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<span class="n">hi</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">a</span><span class="p">)</span>
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<span class="k">while</span> <span class="n">lo</span> <span class="o"><</span> <span class="n">hi</span><span class="p">:</span>
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<span class="n">mid</span> <span class="o">=</span> <span class="p">(</span><span class="n">lo</span><span class="o">+</span><span class="n">hi</span><span class="p">)</span><span class="o">//</span><span class="mi">2</span>
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<span class="k">if</span> <span class="n">key</span><span class="p">(</span><span class="n">a</span><span class="p">[</span><span class="n">mid</span><span class="p">])</span> <span class="o"><</span> <span class="n">key</span><span class="p">(</span><span class="n">x</span><span class="p">):</span> <span class="n">lo</span> <span class="o">=</span> <span class="n">mid</span><span class="o">+</span><span class="mi">1</span>
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<span class="k">else</span><span class="p">:</span> <span class="n">hi</span> <span class="o">=</span> <span class="n">mid</span>
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<span class="n">a</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="n">lo</span><span class="p">,</span> <span class="n">x</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">lo</span></div>
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</pre></div>
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© Copyright 2018, Red Hat, Inc.
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