* **It's a richer interface than the basic sequence.**

* **Extending it generates iter(), contains(), reversed(), index(), and count().**

* **Unlike `'abc.Iterable'` and `'abc.Collection'`, it is not a duck type. That is why `'issubclass(MySequence, collections.abc.Sequence)'` would return False even if MySequence had all the methods defined.**

class MyAbcSequence(collections.abc.Sequence):

def __init__(self, a):

raise <exception>

raise <exception>()

* **Trailing newline gets stripped.**

* **Prompt string is printed to the standard output before reading input.**

Command Line Arguments

<div><h3 id="raisingexceptions">Raising Exceptions</h3><pre><code class="python language-python hljs"><span class="hljs-keyword">raise</span> &lt;exception&gt;

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

<div><h4 id="reraisingcaughtexception">Re-raising caught exception:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">except</span> &lt;exception&gt;:

| +-- ZeroDivisionError # Raised when dividing by zero.

+-- AttributeError # Raised when an attribute is missing.

+-- EOFError # Raised by input() when it hits end-of-file condition.

| +-- IndexError # Raised when a sequence index is out of range.

+-- NameError # Raised when a variable name is not found.

+-- OSError # Failures such as “file not found” or “disk full”.

| +-- FileNotFoundError # When a file or directory is requested but doesn't exist.

<li><strong>Trailing newline gets stripped.</strong></li>

<li><strong>Prompt string is printed to the standard output before reading input.</strong></li>

<div><h2 id="commandlinearguments"><a href="#commandlinearguments" name="commandlinearguments">#</a>Command Line Arguments</h2><pre><code class="python language-python hljs"><span class="hljs-keyword">import</span> sys

script_name = sys.argv[<span class="hljs-number">0</span>]