10000 Cython · gto76/python-cheatsheet@78175bb · GitHub
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‎README.md

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# $ pip3 install cython
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import pyximport; pyximport.install() # Module that runs imported Cython scripts.
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import <cython_script> # Script must be saved with '.pyx' extension.
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<cython_script>.main() # Main() isn't automatically executed.
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```
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#### All `'cdef'` definitions are optional, but they contribute to the speed-up:
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```python
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cdef <ctype/type> [*]<var_name> [= <obj>]
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cdef <ctype>[n_elements] <var_name> [= <coll_of_nums>]
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cdef <ctype>[n_items] <array_name> [= <coll_of_nums/structs>]
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cdef <ctype> *<array_name> = <<ctype> *> malloc(n_items * sizeof(<ctype>))
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cdef <ctype/type/void> <func_name>(<ctype/type> [*]<arg_name>): ...
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```
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‎index.html

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<body>
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<header>
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<aside>June 2, 2025</aside>
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<aside>June 4, 2025</aside>
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<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
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</header>
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<div><h2 id="appendix"><a href="#appendix" name="appendix">#</a>Appendix</h2><div><h3 id="cython">Cython</h3><p><strong>Library that compiles Python-like code into C.</strong></p><pre><code class="python language-python hljs"><span class="hljs-comment"># $ pip3 install cython</span>
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<span class="hljs-keyword">import</span> pyximport; pyximport.install() <span class="hljs-comment"># Module that runs imported Cython scripts.</span>
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<span class="hljs-keyword">import</span> &lt;cython_script&gt; <span class="hljs-comment"># Script must be saved with '.pyx' extension.</span>
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&lt;cython_script&gt;.main() <span class="hljs-comment"># Main() isn't automatically executed.</span>
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</code></pre></div></div>
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<div><h4 id="allcdefdefinitionsareoptionalbuttheycontributetothespeedup">All <code class="python hljs"><span class="hljs-string">'cdef'</span></code> definitions are optional, but they contribute to the speed-up:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">cdef</span> &lt;ctype/type&gt; [*]&lt;var_name&gt; [= &lt;obj&gt;]
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<span class="hljs-keyword">cdef</span> &lt;ctype&gt;[n_elements] &lt;var_name&gt; [= &lt;coll_of_nums&gt;]
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<span class="hljs-keyword">cdef</span> &lt;ctype&gt;[n_items] &lt;array_name&gt; [= &lt;coll_of_nums/structs&gt;]
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<span class="hljs-keyword">cdef</span> &lt;ctype&gt; *&lt;array_name&gt; = &lt;&lt;ctype&gt; *&gt; malloc(n_items * sizeof(&lt;ctype&gt;))
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<span class="hljs-keyword">cdef</span> &lt;ctype/type/void&gt; &lt;func_name&gt;(&lt;ctype/type&gt; [*]&lt;arg_name&gt;): ...
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</code></pre></div>
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<footer>
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<aside>June 2, 2025</aside>
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<aside>June 4, 2025</aside>
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<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
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</footer>
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‎parse.js

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'<span class="hljs-number">3</span> <span class="hljs-number">1</span> <span class="hljs-number">2</span>\n' +
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'<span class="hljs-number">6</span> <span class="hljs-number">11</span> <span class="hljs-number">13</span>';
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const CYTHON_1 =
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'<span class="hljs-keyword">cdef</span> &lt;ctype/type&gt; [*]&lt;var_name&gt; [= &lt;obj&gt;]\n' +
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'<span class="hljs-keyword">cdef</span> &lt;ctype&gt;[n_elements] &lt;var_name&gt; [= &lt;coll_of_nums&gt;]\n' +
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'<span class="hljs-keyword">cdef</span> &lt;ctype&gt;[n_items] &lt;array_name&gt; [= &lt;coll_of_nums/structs&gt;]\n' +
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'<span class="hljs-keyword">cdef</span> &lt;ctype&gt; *&lt;array_name&gt; = &lt;&lt;ctype&gt; *&gt; malloc(n_items * sizeof(&lt;ctype&gt;))\n' +
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'<span class="hljs-keyword">cdef</span> &lt;ctype/type/void&gt; &lt;func_name&gt;(&lt;ctype/type&gt; [*]&lt;arg_name&gt;): ...\n';
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const CYTHON_2 =

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