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feat: add matlab.md cheatsheet (#21). 02d0a495a6
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jaywcjlove
@ -230,7 +230,7 @@
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</span></code></pre>
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<p>Key：值对，JSON 类对象</p>
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</div></div></div><div class="wrap h3body-exist"><div class="wrap-header h3wrap"><h3 id="casting"><a aria-hidden="true" tabindex="-1" href="#casting"><span class="icon icon-link"></span></a>Casting</h3><div class="wrap-body">
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</div></div><div class="h3wrap-body"><h4 id="整数-integers"><a aria-hidden="true" tabindex="-1" href="#整数-integers"><span class="icon icon-link"></span></a>整数 Integers</h4>
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<h4 id="整数-integers"><a aria-hidden="true" tabindex="-1" href="#整数-integers"><span class="icon icon-link"></span></a>整数 Integers</h4>
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line">x <span class="token operator">=</span> <span class="token builtin">int</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span> <span class="token comment"># x 将是 1</span>
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</span><span class="code-line">y <span class="token operator">=</span> <span class="token builtin">int</span><span class="token punctuation">(</span><span class="token number">2.8</span><span class="token punctuation">)</span> <span class="token comment"># y 将是 2</span>
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</span><span class="code-line">z <span class="token operator">=</span> <span class="token builtin">int</span><span class="token punctuation">(</span><span class="token string">"3"</span><span class="token punctuation">)</span> <span class="token comment"># z 将是 3</span>
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@ -246,7 +246,7 @@
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</span><span class="code-line">y <span class="token operator">=</span> <span class="token builtin">str</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">)</span> <span class="token comment"># y 将是 '2'</span>
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</span><span class="code-line">z <span class="token operator">=</span> <span class="token builtin">str</span><span class="token punctuation">(</span><span class="token number">3.0</span><span class="token punctuation">)</span> <span class="token comment"># z 将是 '3.0'</span>
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</span></code></pre>
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</div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="python-字符串"><a aria-hidden="true" tabindex="-1" href="#python-字符串"><span class="icon icon-link"></span></a>Python 字符串</h2><div class="wrap-body">
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</div></div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="python-字符串"><a aria-hidden="true" tabindex="-1" href="#python-字符串"><span class="icon icon-link"></span></a>Python 字符串</h2><div class="wrap-body">
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</div></div><div class="h2wrap-body"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="类数组"><a aria-hidden="true" tabindex="-1" href="#类数组"><span class="icon icon-link"></span></a>类数组</h3><div class="wrap-body">
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> hello <span class="token operator">=</span> <span class="token string">"Hello, World"</span>
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</span><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> <span class="token keyword">print</span><span class="token punctuation">(</span>hello<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">)</span>
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@ -296,7 +296,7 @@
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</span><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> s<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">:</span><span class="token number">6</span><span class="token punctuation">]</span>
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</span><span class="code-line"><span class="token string">'baco'</span>
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</span></code></pre>
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</div></div><div class="h3wrap-body"><h4 id="迈着大步"><a aria-hidden="true" tabindex="-1" href="#迈着大步"><span class="icon icon-link"></span></a>迈着大步</h4>
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<h4 id="迈着大步"><a aria-hidden="true" tabindex="-1" href="#迈着大步"><span class="icon icon-link"></span></a>迈着大步</h4>
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> s <span class="token operator">=</span> <span class="token string">'12345'</span> <span class="token operator">*</span> <span class="token number">5</span>
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</span><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> s
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</span><span class="code-line"><span class="token string">'1234512345123451234512345'</span>
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@ -309,7 +309,7 @@
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</span><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> s<span class="token punctuation">[</span><span class="token punctuation">:</span><span class="token punctuation">:</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">]</span>
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</span><span class="code-line"><span class="token string">'5432154321543215432154321'</span>
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</span></code></pre>
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</div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="字符串长度"><a aria-hidden="true" tabindex="-1" href="#字符串长度"><span class="icon icon-link"></span></a>字符串长度</h3><div class="wrap-body">
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</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="字符串长度"><a aria-hidden="true" tabindex="-1" href="#字符串长度"><span class="icon icon-link"></span></a>字符串长度</h3><div class="wrap-body">
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> hello <span class="token operator">=</span> <span class="token string">"Hello, World!"</span>
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</span><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> <span class="token keyword">print</span><span class="token punctuation">(</span><span class="token builtin">len</span><span class="token punctuation">(</span>hello<span class="token punctuation">)</span><span class="token punctuation">)</span>
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</span><span class="code-line"><span class="token number">13</span>
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@ -346,12 +346,12 @@
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</span><span class="code-line">age <span class="token operator">=</span> <span class="token number">23</span>
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</span><span class="code-line"><span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">"%s is %d years old."</span> <span class="token operator">%</span> <span class="token punctuation">(</span>name<span class="token punctuation">,</span> age<span class="token punctuation">)</span><span class="token punctuation">)</span>
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</span></code></pre>
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</div></div><div class="h3wrap-body"><h4 id="format-方法"><a aria-hidden="true" tabindex="-1" href="#format-方法"><span class="icon icon-link"></span></a>format() 方法</h4>
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<h4 id="format-方法"><a aria-hidden="true" tabindex="-1" href="#format-方法"><span class="icon icon-link"></span></a>format() 方法</h4>
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line">txt1 <span class="token operator">=</span> <span class="token string">"My name is {fname}, I'm {age}"</span><span class="token punctuation">.</span><span class="token builtin">format</span><span class="token punctuation">(</span>fname<span class="token operator">=</span><span class="token string">"John"</span><span class="token punctuation">,</span> age<span class="token operator">=</span><span class="token number">36</span><span class="token punctuation">)</span>
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</span><span class="code-line">txt2 <span class="token operator">=</span> <span class="token string">"My name is {0}, I'm {1}"</span><span class="token punctuation">.</span><span class="token builtin">format</span><span class="token punctuation">(</span><span class="token string">"John"</span><span class="token punctuation">,</span> <span class="token number">36</span><span class="token punctuation">)</span>
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</span><span class="code-line">txt3 <span class="token operator">=</span> <span class="token string">"My name is {}, I'm {}"</span><span class="token punctuation">.</span><span class="token builtin">format</span><span class="token punctuation">(</span><span class="token string">"John"</span><span class="token punctuation">,</span> <span class="token number">36</span><span class="token punctuation">)</span>
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</span></code></pre>
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</div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="input-输入"><a aria-hidden="true" tabindex="-1" href="#input-输入"><span class="icon icon-link"></span></a>Input 输入</h3><div class="wrap-body">
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</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="input-输入"><a aria-hidden="true" tabindex="-1" href="#input-输入"><span class="icon icon-link"></span></a>Input 输入</h3><div class="wrap-body">
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> name <span class="token operator">=</span> <span class="token builtin">input</span><span class="token punctuation">(</span><span class="token string">"Enter your name: "</span><span class="token punctuation">)</span>
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</span><span class="code-line">Enter your name<span class="token punctuation">:</span> Tom
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</span><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> name
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@ -500,7 +500,7 @@
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line">a_list<span class="token punctuation">[</span>start<span class="token punctuation">:</span>end<span class="token punctuation">]</span>
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</span><span class="code-line">a_list<span class="token punctuation">[</span>start<span class="token punctuation">:</span>end<span class="token punctuation">:</span>step<span class="token punctuation">]</span>
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</span></code></pre>
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</div></div><div class="h3wrap-body"><h4 id="切片"><a aria-hidden="true" tabindex="-1" href="#切片"><span class="icon icon-link"></span></a>切片</h4>
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<h4 id="切片"><a aria-hidden="true" tabindex="-1" href="#切片"><span class="icon icon-link"></span></a>切片</h4>
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> a <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token string">'spam'</span><span class="token punctuation">,</span> <span class="token string">'egg'</span><span class="token punctuation">,</span> <span class="token string">'bacon'</span><span class="token punctuation">,</span> <span class="token string">'tomato'</span><span class="token punctuation">,</span> <span class="token string">'ham'</span><span class="token punctuation">,</span> <span class="token string">'lobster'</span><span class="token punctuation">]</span>
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</span><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> a<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">:</span><span class="token number">5</span><span class="token punctuation">]</span>
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</span><span class="code-line"><span class="token punctuation">[</span><span class="token string">'bacon'</span><span class="token punctuation">,</span> <span class="token string">'tomato'</span><span class="token punctuation">,</span> <span class="token string">'ham'</span><span class="token punctuation">]</span>
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@ -536,7 +536,7 @@
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</span><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> a<span class="token punctuation">[</span><span class="token punctuation">:</span><span class="token punctuation">:</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">]</span>
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</span><span class="code-line"><span class="token punctuation">[</span><span class="token string">'lobster'</span><span class="token punctuation">,</span> <span class="token string">'ham'</span><span class="token punctuation">,</span> <span class="token string">'tomato'</span><span class="token punctuation">,</span> <span class="token string">'bacon'</span><span class="token punctuation">,</span> <span class="token string">'egg'</span><span class="token punctuation">,</span> <span class="token string">'spam'</span><span class="token punctuation">]</span>
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</span></code></pre>
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</div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="删除"><a aria-hidden="true" tabindex="-1" href="#删除"><span class="icon icon-link"></span></a>删除</h3><div class="wrap-body">
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</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="删除"><a aria-hidden="true" tabindex="-1" href="#删除"><span class="icon icon-link"></span></a>删除</h3><div class="wrap-body">
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> li <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token string">'bread'</span><span class="token punctuation">,</span> <span class="token string">'butter'</span><span class="token punctuation">,</span> <span class="token string">'milk'</span><span class="token punctuation">]</span>
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</span><span class="code-line"><span class="token operator">>></span><span class="token operator">></span> li<span class="token punctuation">.</span>pop<span class="token punctuation">(</span><span class="token punctuation">)</span>
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</span><span class="code-line"><span class="token string">'milk'</span>
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@ -731,7 +731,7 @@
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</span></code></pre>
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</div></div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="python-文件处理"><a aria-hidden="true" tabindex="-1" href="#python-文件处理"><span class="icon icon-link"></span></a>Python 文件处理</h2><div class="wrap-body">
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</div></div><div class="h2wrap-body"><div class="wrap h3body-exist"><div class="wrap-header h3wrap"><h3 id="读取文件"><a aria-hidden="true" tabindex="-1" href="#读取文件"><span class="icon icon-link"></span></a>读取文件</h3><div class="wrap-body">
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</div></div><div class="h3wrap-body"><h4 id="逐行"><a aria-hidden="true" tabindex="-1" href="#逐行"><span class="icon icon-link"></span></a>逐行</h4>
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<h4 id="逐行"><a aria-hidden="true" tabindex="-1" href="#逐行"><span class="icon icon-link"></span></a>逐行</h4>
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line"><span class="token keyword">with</span> <span class="token builtin">open</span><span class="token punctuation">(</span><span class="token string">"myfile.txt"</span><span class="token punctuation">)</span> <span class="token keyword">as</span> <span class="token builtin">file</span><span class="token punctuation">:</span>
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</span><span class="code-line"> <span class="token keyword">for</span> line <span class="token keyword">in</span> <span class="token builtin">file</span><span class="token punctuation">:</span>
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</span><span class="code-line"> <span class="token keyword">print</span><span class="token punctuation">(</span>line<span class="token punctuation">)</span>
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@ -741,8 +741,8 @@
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</span><span class="code-line"><span class="token keyword">for</span> i<span class="token punctuation">,</span> line <span class="token keyword">in</span> <span class="token builtin">enumerate</span><span class="token punctuation">(</span><span class="token builtin">file</span><span class="token punctuation">,</span> start<span class="token operator">=</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">:</span>
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</span><span class="code-line"> <span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">"Number %s: %s"</span> <span class="token operator">%</span> <span class="token punctuation">(</span>i<span class="token punctuation">,</span> line<span class="token punctuation">)</span><span class="token punctuation">)</span>
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</span></code></pre>
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</div></div><div class="wrap h3body-exist"><div class="wrap-header h3wrap"><h3 id="字符串-1"><a aria-hidden="true" tabindex="-1" href="#字符串-1"><span class="icon icon-link"></span></a>字符串</h3><div class="wrap-body">
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</div></div><div class="h3wrap-body"><h4 id="写一个字符串"><a aria-hidden="true" tabindex="-1" href="#写一个字符串"><span class="icon icon-link"></span></a>写一个字符串</h4>
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</div></div></div><div class="wrap h3body-exist"><div class="wrap-header h3wrap"><h3 id="字符串-1"><a aria-hidden="true" tabindex="-1" href="#字符串-1"><span class="icon icon-link"></span></a>字符串</h3><div class="wrap-body">
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<h4 id="写一个字符串"><a aria-hidden="true" tabindex="-1" href="#写一个字符串"><span class="icon icon-link"></span></a>写一个字符串</h4>
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line">contents <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token string">"aa"</span><span class="token punctuation">:</span> <span class="token number">12</span><span class="token punctuation">,</span> <span class="token string">"bb"</span><span class="token punctuation">:</span> <span class="token number">21</span><span class="token punctuation">}</span>
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</span><span class="code-line"><span class="token keyword">with</span> <span class="token builtin">open</span><span class="token punctuation">(</span><span class="token string">"myfile1.txt"</span><span class="token punctuation">,</span> <span class="token string">"w+"</span><span class="token punctuation">)</span> <span class="token keyword">as</span> <span class="token builtin">file</span><span class="token punctuation">:</span>
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</span><span class="code-line"> <span class="token builtin">file</span><span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token builtin">str</span><span class="token punctuation">(</span>contents<span class="token punctuation">)</span><span class="token punctuation">)</span>
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@ -752,8 +752,8 @@
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</span><span class="code-line"> contents <span class="token operator">=</span> <span class="token builtin">file</span><span class="token punctuation">.</span>read<span class="token punctuation">(</span><span class="token punctuation">)</span>
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</span><span class="code-line"><span class="token keyword">print</span><span class="token punctuation">(</span>contents<span class="token punctuation">)</span>
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</span></code></pre>
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</div></div><div class="wrap h3body-exist"><div class="wrap-header h3wrap"><h3 id="对象"><a aria-hidden="true" tabindex="-1" href="#对象"><span class="icon icon-link"></span></a>对象</h3><div class="wrap-body">
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</div></div><div class="h3wrap-body"><h4 id="写一个对象"><a aria-hidden="true" tabindex="-1" href="#写一个对象"><span class="icon icon-link"></span></a>写一个对象</h4>
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</div></div></div><div class="wrap h3body-exist"><div class="wrap-header h3wrap"><h3 id="对象"><a aria-hidden="true" tabindex="-1" href="#对象"><span class="icon icon-link"></span></a>对象</h3><div class="wrap-body">
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<h4 id="写一个对象"><a aria-hidden="true" tabindex="-1" href="#写一个对象"><span class="icon icon-link"></span></a>写一个对象</h4>
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line">contents <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token string">"aa"</span><span class="token punctuation">:</span> <span class="token number">12</span><span class="token punctuation">,</span> <span class="token string">"bb"</span><span class="token punctuation">:</span> <span class="token number">21</span><span class="token punctuation">}</span>
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</span><span class="code-line"><span class="token keyword">with</span> <span class="token builtin">open</span><span class="token punctuation">(</span><span class="token string">"myfile2.txt"</span><span class="token punctuation">,</span> <span class="token string">"w+"</span><span class="token punctuation">)</span> <span class="token keyword">as</span> <span class="token builtin">file</span><span class="token punctuation">:</span>
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</span><span class="code-line"> <span class="token builtin">file</span><span class="token punctuation">.</span>write<span class="token punctuation">(</span>json<span class="token punctuation">.</span>dumps<span class="token punctuation">(</span>contents<span class="token punctuation">)</span><span class="token punctuation">)</span>
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@ -763,7 +763,7 @@
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</span><span class="code-line"> contents <span class="token operator">=</span> json<span class="token punctuation">.</span>load<span class="token punctuation">(</span><span class="token builtin">file</span><span class="token punctuation">)</span>
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</span><span class="code-line"><span class="token keyword">print</span><span class="token punctuation">(</span>contents<span class="token punctuation">)</span>
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</span></code></pre>
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</div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="删除文件"><a aria-hidden="true" tabindex="-1" href="#删除文件"><span class="icon icon-link"></span></a>删除文件</h3><div class="wrap-body">
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</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="删除文件"><a aria-hidden="true" tabindex="-1" href="#删除文件"><span class="icon icon-link"></span></a>删除文件</h3><div class="wrap-body">
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<pre class="language-python"><code class="language-python code-highlight"><span class="code-line"><span class="token keyword">import</span> os
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</span><span class="code-line">os<span class="token punctuation">.</span>remove<span class="token punctuation">(</span><span class="token string">"myfile.txt"</span><span class="token punctuation">)</span>
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</span></code></pre>
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