* **If only repr() is defined, it will also be used for str().**

* **Methods decorated with `'@staticmethod'` do not receive 'self' nor 'cls' as their first arg.**

print(<el>)

f'{<el>}'

raise Exception(<el>)

print/str/repr([<el>])

f'{<el>!r}'

* **Only required methods are len() and getitem().**

* **Getitem() should return an item at the passed index or raise IndexError.**

* **Iter() and contains() automatically work on any object that has getitem() defined.**

class MySequence:

def __init__(self, a):

<li><strong>If only repr() is defined, it will also be used for str().</strong></li>

<li><strong>Methods decorated with <code class="python hljs"><span class="hljs-string">'@staticmethod'</span></code> do not receive 'self' nor 'cls' as their first arg.</strong></li>

<span class="hljs-string">f'<span class="hljs-subst">{&lt;el&gt;}</span>'</span>

logging.warning(&lt;el&gt;)

csv.writer(&lt;file&gt;).writerow([&lt;el&gt;])

<span class="hljs-keyword">raise</span> Exception(&lt;el&gt;)

<span class="hljs-string">f'<span class="hljs-subst">{&lt;el&gt;!r}</span>'</span>

Z = dataclasses.make_dataclass(<span class="hljs-string">'Z'</span>, [<span class="hljs-string">'a'</span>]); print/str/repr(Z(&lt;el&gt;))

<span class="hljs-meta">&gt;&gt;&gt; </span>&lt;el&gt;

<li><strong>Only required methods are len() and getitem().</strong></li>

<li><strong>Getitem() should return an item at the passed index or raise IndexError.</strong></li>

<li><strong>Iter() and contains() automatically work on any object that has getitem() defined.</strong></li>

</ul><pre><code class="python language-python hljs"><span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">MySequence</span>:</span>

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

self.a = a