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python-cheatsheet
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Class, typing subsection

pull/109/merge
Jure Šorn 1 year ago
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  1. 5
      README.md
  2. 11
      index.html

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@ -1068,9 +1068,10 @@ from dataclasses import make_dataclass
#### Rest of type annotations (CPython interpreter ignores them all):
```python
import typing as tp, collections.abc as abc
<var_name>: list/set/abc.Iterable/abc.Sequence/tp.Optional[<type>] [= <obj>]
<var_name>: dict/tuple/tp.Union[<type>, ...] [= <obj>]
def func(<arg_name>: <type> [= <obj>]) -> <type>: ...
<var_name>: typing.List/Set/Iterable/Sequence/Optional[<type>]
<var_name>: typing.Dict/Tuple/Union[<type>, ...]
```
### Slots

11
index.html
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@ -54,7 +54,7 @@
<body>
<header>
<aside>April 13, 2023</aside>
<aside>May 26, 2023</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header>
@ -903,9 +903,10 @@ Z = dataclasses.make_dataclass(<span class="hljs-string">'Z'</span>, [<span clas
&lt;class&gt; = make_dataclass(<span class="hljs-string">'&lt;class_name&gt;'</span>, &lt;coll_of_tuples&gt;)
&lt;tuple&gt; = (<span class="hljs-string">'&lt;attr_name&gt;'</span>, &lt;type&gt; [, &lt;default_value&gt;])</code></pre></div>
<div><h4 id="restoftypeannotationscpythoninterpreterignoresthemall">Rest of type annotations (CPython interpreter ignores them all):</h4><pre><code class="python language-python hljs"><span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">func</span><span class="hljs-params">(&lt;arg_name&gt;: &lt;type&gt; [= &lt;obj&gt;])</span> -&gt; &lt;type&gt;:</span> ...
&lt;var_name&gt;: typing.List/Set/Iterable/Sequence/Optional[&lt;type&gt;]
&lt;var_name&gt;: typing.Dict/Tuple/Union[&lt;type&gt;, ...]
<div><h4 id="restoftypeannotationscpythoninterpreterignoresthemall">Rest of type annotations (CPython interpreter ignores them all):</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">import</span> typing <span class="hljs-keyword">as</span> tp, collections.abc <span class="hljs-keyword">as</span> abc
&lt;var_name&gt;: list/set/abc.Iterable/abc.Sequence/tp.Optional[&lt;type&gt;] [= &lt;obj&gt;]
&lt;var_name&gt;: dict/tuple/tp.Union[&lt;type&gt;, ...] [= &lt;obj&gt;]
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">func</span><span class="hljs-params">(&lt;arg_name&gt;: &lt;type&gt; [= &lt;obj&gt;])</span> -&gt; &lt;type&gt;:</span> ...
</code></pre></div>
<div><h3 id="slots">Slots</h3><p><strong>Mechanism that restricts objects to attributes listed in 'slots' and significantly reduces their memory footprint.</strong></p><pre><code class="python language-python hljs"><span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">MyClassWithSlots</span>:</span>
@ -2935,7 +2936,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.' <span class="hljs-comment">
<footer>
<aside>April 13, 2023</aside>
<aside>May 26, 2023</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer>

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