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python-cheatsheet
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Csv, Introspection

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Jure Šorn 2 years ago
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  1. 10
      README.md
  2. 14
      index.html

10
README.md
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@ -1829,7 +1829,7 @@ import csv
* **`'delimiter'` - A one-character string used to separate fields.** * **`'delimiter'` - A one-character string used to separate fields.**
* **`'quotechar'` - Character for quoting fields that contain special characters.** * **`'quotechar'` - Character for quoting fields that contain special characters.**
* **`'doublequote'` - Whether quotechars inside fields are/get doubled or escaped.** * **`'doublequote'` - Whether quotechars inside fields are/get doubled or escaped.**
* **`'skipinitialspace'` - Whether whitespace after delimiter gets stripped by reader.**
* **`'skipinitialspace'` - Is space character at the start of the field stripped by reader.**
* **`'lineterminator'` - How writer terminates rows. Reader is hardcoded to '\n', '\r', '\r\n'.** * **`'lineterminator'` - How writer terminates rows. Reader is hardcoded to '\n', '\r', '\r\n'.**
* **`'quoting'` - 0: As necessary, 1: All, 2: All but numbers which are read as floats, 3: None.** * **`'quoting'` - 0: As necessary, 1: All, 2: All but numbers which are read as floats, 3: None.**
* **`'escapechar'` - Character for escaping quotechars if doublequote is False.** * **`'escapechar'` - Character for escaping quotechars if doublequote is False.**
@ -2192,11 +2192,11 @@ delattr(<object>, '<attr_name>') # Same. Also `del <object>.<attr_name
### Parameters ### Parameters
```python ```python
from inspect import signature
<Sig> = signature(<function>) # Function's Signature object.
<dict> = <Sig>.parameters # Dict of function's Parameter objects.
<str> = <Param>.name # Parameter's name.
<Sig> = inspect.signature(<function>) # Function's Signature object.
<dict> = <Sig>.parameters # Dict of Parameter objects.
<memb> = <Param>.kind # Member of ParameterKind enum. <memb> = <Param>.kind # Member of ParameterKind enum.
<obj> = <Param>.default # Default value or <Param>.empty.
<type> = <Param>.annotation # Type or <Param>.empty.
``` ```

14
index.html
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@ -54,7 +54,7 @@
<body> <body>
<header> <header>
<aside>July 26, 2022</aside>
<aside>July 27, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a> <a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header> </header>
@ -1528,7 +1528,7 @@ CompletedProcess(args=[<span class="hljs-string">'bc'</span>, <span class="hljs-
<li><strong><code class="python hljs"><span class="hljs-string">'delimiter'</span></code> - A one-character string used to separate fields.</strong></li> <li><strong><code class="python hljs"><span class="hljs-string">'delimiter'</span></code> - A one-character string used to separate fields.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'quotechar'</span></code> - Character for quoting fields that contain special characters.</strong></li> <li><strong><code class="python hljs"><span class="hljs-string">'quotechar'</span></code> - Character for quoting fields that contain special characters.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'doublequote'</span></code> - Whether quotechars inside fields are/get doubled or escaped.</strong></li> <li><strong><code class="python hljs"><span class="hljs-string">'doublequote'</span></code> - Whether quotechars inside fields are/get doubled or escaped.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'skipinitialspace'</span></code> - Whether whitespace after delimiter gets stripped by reader.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'skipinitialspace'</span></code> - Is space character at the start of the field stripped by reader.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'lineterminator'</span></code> - How writer terminates rows. Reader is hardcoded to '\n', '\r', '\r\n'.</strong></li> <li><strong><code class="python hljs"><span class="hljs-string">'lineterminator'</span></code> - How writer terminates rows. Reader is hardcoded to '\n', '\r', '\r\n'.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'quoting'</span></code> - 0: As necessary, 1: All, 2: All but numbers which are read as floats, 3: None.</strong></li> <li><strong><code class="python hljs"><span class="hljs-string">'quoting'</span></code> - 0: As necessary, 1: All, 2: All but numbers which are read as floats, 3: None.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'escapechar'</span></code> - Character for escaping quotechars if doublequote is False.</strong></li> <li><strong><code class="python hljs"><span class="hljs-string">'escapechar'</span></code> - Character for escaping quotechars if doublequote is False.</strong></li>
@ -1810,11 +1810,11 @@ setattr(&lt;object&gt;, <span class="hljs-string">'&lt;attr_name&gt;'</span>, va
delattr(&lt;object&gt;, <span class="hljs-string">'&lt;attr_name&gt;'</span>) <span class="hljs-comment"># Same. Also `del &lt;object&gt;.&lt;attr_name&gt;`.</span> delattr(&lt;object&gt;, <span class="hljs-string">'&lt;attr_name&gt;'</span>) <span class="hljs-comment"># Same. Also `del &lt;object&gt;.&lt;attr_name&gt;`.</span>
</code></pre></div> </code></pre></div>
<div><h3 id="parameters-1">Parameters</h3><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> inspect <span class="hljs-keyword">import</span> signature
&lt;Sig&gt; = signature(&lt;function&gt;) <span class="hljs-comment"># Function's Signature object.</span>
&lt;dict&gt; = &lt;Sig&gt;.parameters <span class="hljs-comment"># Dict of function's Parameter objects.</span>
&lt;str&gt; = &lt;Param&gt;.name <span class="hljs-comment"># Parameter's name.</span>
<div><h3 id="parameters-1">Parameters</h3><pre><code class="python language-python hljs">&lt;Sig&gt; = inspect.signature(&lt;function&gt;) <span class="hljs-comment"># Function's Signature object.</span>
&lt;dict&gt; = &lt;Sig&gt;.parameters <span class="hljs-comment"># Dict of Parameter objects.</span>
&lt;memb&gt; = &lt;Param&gt;.kind <span class="hljs-comment"># Member of ParameterKind enum.</span> &lt;memb&gt; = &lt;Param&gt;.kind <span class="hljs-comment"># Member of ParameterKind enum.</span>
&lt;obj&gt; = &lt;Param&gt;.default <span class="hljs-comment"># Default value or &lt;Param&gt;.empty.</span>
&lt;type&gt; = &lt;Param&gt;.annotation <span class="hljs-comment"># Type or &lt;Param&gt;.empty.</span>
</code></pre></div> </code></pre></div>
<div><h2 id="metaprogramming"><a href="#metaprogramming" name="metaprogramming">#</a>Metaprogramming</h2><p><strong>Code that generates code.</strong></p><div><h3 id="type-1">Type</h3><p><strong>Type is the root class. If only passed an object it returns its type (class). Otherwise it creates a new class.</strong></p><pre><code class="python language-python hljs">&lt;class&gt; = type(<span class="hljs-string">'&lt;class_name&gt;'</span>, &lt;tuple_of_parents&gt;, &lt;dict_of_class_attributes&gt;)</code></pre></div></div> <div><h2 id="metaprogramming"><a href="#metaprogramming" name="metaprogramming">#</a>Metaprogramming</h2><p><strong>Code that generates code.</strong></p><div><h3 id="type-1">Type</h3><p><strong>Type is the root class. If only passed an object it returns its type (class). Otherwise it creates a new class.</strong></p><pre><code class="python language-python hljs">&lt;class&gt; = type(<span class="hljs-string">'&lt;class_name&gt;'</span>, &lt;tuple_of_parents&gt;, &lt;dict_of_class_attributes&gt;)</code></pre></div></div>
@ -2905,7 +2905,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.' <span class="hljs-comment">
<footer> <footer>
<aside>July 26, 2022</aside>
<aside>July 27, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a> <a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer> </footer>

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