<iter> = repeat(<el> [, times]) # Returns element endlessly or 'times' times.
<iter> = cycle(<collection>) # Repeats the sequence endlessly.
```
@ -261,8 +261,8 @@ Type
from types import FunctionType, MethodType, LambdaType, GeneratorType
```
### ABC
**An abstract base class introduces virtual subclasses that don’t inherit from it, but are still recognized by isinstance() and issubclass().**
### Abstract Base Classes
**Each abstract base class specifies a set of virtual subclasses. This classes get recognized by isinstance() and issubclass() as subclasses of the ABC, although they are really not.**
```python
>>> from collections.abc import Sequence, Collection, Iterable
@ -250,7 +250,7 @@ product_of_elems = functools.reduce(<span class="hljs-keyword">lambda</span> out
list_of_chars = list(<str>)
</code></pre>
<ul>
<li><strong>Module <ahref="#operator">operator</a> provides functions itemgetter() and mul() that offer the same functionality as lambda expressions above.</strong></li>
<li><strong>Module <ahref="#operator">operator</a> provides functions itemgetter() and mul() that offer the same functionality as <ahref="#lambda">lambda</a> expressions above.</strong></li>
</ul>
<pre><codeclass="python language-python hljs"><int> = <list>.count(<el>) <spanclass="hljs-comment"># Returns number of occurrences. Also works on strings.</span>
index = <list>.index(<el>) <spanclass="hljs-comment"># Returns index of first occurrence or raises ValueError.</span>
<div><h4id="sometypesdonothavebuiltinnamessotheymustbeimported">Some types do not have built-in names, so they must be imported:</h4><pre><codeclass="python language-python hljs"><spanclass="hljs-keyword">from</span> types <spanclass="hljs-keyword">import</span> FunctionType, MethodType, LambdaType, GeneratorType
</code></pre></div>
<div><h3id="abc">ABC</h3><p><strong>An abstract base class introduces virtual subclasses that don’t inherit from it, but are still recognized by isinstance() and issubclass().</strong></p><pre><codeclass="python language-python hljs"><spanclass="hljs-meta">>>></span><spanclass="hljs-keyword">from</span> collections.abc <spanclass="hljs-keyword">import</span> Sequence, Collection, Iterable
<div><h3id="abstractbaseclasses">Abstract Base Classes</h3><p><strong>Each abstract base class specifies a set of virtual subclasses. This classes get recognized by isinstance() and issubclass() as subclasses of the ABC, although they are really not.</strong></p><pre><codeclass="python language-python hljs"><spanclass="hljs-meta">>>></span><spanclass="hljs-keyword">from</span> collections.abc <spanclass="hljs-keyword">import</span> Sequence, Collection, Iterable
<div><h3id="timezone">Timezone</h3><pre><codeclass="python language-python apache hljs"><tzinfo> = UTC <spanclass="hljs-comment"># UTC timezone. London without DST.</span>
<tzinfo> = tzlocal() <spanclass="hljs-comment"># Local timezone. Also gettz().</span>
<tzinfo> = gettz(<spanclass="hljs-string">'<Cont.>/<City>'</span>)<spanclass="hljs-comment"># 'Continent/City_Name' timezone or None.</span>
<tzinfo> = gettz(<spanclass="hljs-string">'<Continent>/<City>'</span>) <spanclass="hljs-comment"># 'Continent/City_Name' timezone or None.</span>
<DTa> = <DT>.astimezone(<tzinfo>) <spanclass="hljs-comment"># Datetime, converted to passed timezone.</span>
<Ta/DTa> = <T/DT>.replace(tzinfo=<tzinfo>) <spanclass="hljs-comment"># Unconverted object with new timezone.</span>
</code></pre></div>
@ -1055,7 +1055,7 @@ Z = dataclasses.make_dataclass(<span class="hljs-string">'Z'</span>, [<span clas
<div><h3id="sortable">Sortable</h3><ul>
<li><strong>With total_ordering decorator you only need to provide eq() and one of lt(), gt(), le() or ge() special methods.</strong></li>
<li><strong>With total_ordering decorator, you only need to provide eq() and one of lt(), gt(), le() or ge() special methods.</strong></li>
Jure Šorn
4 years ago