* **Function field() is needed because `'<attr_name>: list = []'` would make a list that is shared among all instances.**

* **Default_factory can be any [callable](#callable).**

**Mechanism that restricts objects to attributes listed in 'slots' and significantly reduces their memory footprint.**

reader(adder(printer())) # 100, 101, ..., 109

Libraries

rows = csv.reader(file)

header = [a.title() for a in next(rows)]

table = tabulate.tabulate(rows, header)

from collections import namedtuple

from dataclasses import make_dataclass

from enum import Enum

import re

def main():

<li><strong>Function field() is needed because <code class="python hljs"><span class="hljs-string">'&lt;attr_name&gt;: list = []'</span></code> would make a list that is shared among all instances.</strong></li>

<li><strong>Default_factory can be any <a href="#callable">callable</a>.</strong></li>

<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>

__slots__ = [<span class="hljs-string">'a'</span>]

<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">__init__</span><span class="hljs-params">(self)</span>:</span>

member_values = [a.value <span class="hljs-keyword">for</span> a <span class="hljs-keyword">in</span> &lt;enum&gt;]

random_member = random.choice(list(&lt;enum&gt;))

Cutlery = Enum(<span class="hljs-string">'Cutlery'</span>, <span class="hljs-string">'fork knife spoon'</span>)

Cutlery = Enum(<span class="hljs-string">'Cutlery'</span>, {<span class="hljs-string">'fork'</span>: <span class="hljs-number">1</span>, <span class="hljs-string">'knife'</span>: <span class="hljs-number">2</span>, <span class="hljs-string">'spoon'</span>: <span class="hljs-number">3</span>})

reader(adder(printer())) <span class="hljs-comment"># 100, 101, ..., 109</span>

<div><h1 id="libraries">Libraries</h1><div><h2 id="progressbar"><a href="#progressbar" name="progressbar">#</a>Progress Bar</h2><pre><code class="python language-python hljs"><span class="hljs-comment"># $ pip3 install tqdm</span>

<span class="hljs-keyword">from</span> tqdm <span class="hljs-keyword">import</span> tqdm

<span class="hljs-keyword">from</span> time <span class="hljs-keyword">import</span> sleep

rows = csv.reader(file)

header = [a.title() <span class="hljs-keyword">for</span> a <span class="hljs-keyword">in</span> next(rows)]

table = tabulate.tabulate(rows, header)

<span class="hljs-keyword">from</span> collections <span class="hljs-keyword">import</span> namedtuple

<span class="hljs-keyword">from</span> dataclasses <span class="hljs-keyword">import</span> make_dataclass

<span class="hljs-keyword">from</span> enum <span class="hljs-keyword">import</span> Enum

<span class="hljs-keyword">import</span> re

<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">main</span><span class="hljs-params">()</span>:</span>

const TYPE =

'<code class="python language-python hljs">&lt;class&gt; = type(&lt;class_name&gt;, &lt;parents_tuple&gt;, &lt;attributes_dict&gt;)</code>';

function main() {

const html = getMd();

$(`code:contains(ValueError: malformed node)`).html(EVAL);

$(`code:contains(@lru_cache(maxsize=None))`).html(LRU_CACHE);

$(`code:contains(<class_name>, <parents_tuple>, <attributes_dict>)`).html(TYPE);

function preventPageBreaks() {