Where can I read about import _{module name} in Python?
<p>I've notice this. Example:</p>

<p>create an empty text file called for example ast.py</p>

<pre><code>$ touch ast.py
</code></pre>

<p>run Python</p>

<pre><code>$ python
&gt;&gt;&gt; from ast import *
&gt;&gt;&gt; dir()
['__builtins__', '__doc__', '__name__', '__package__']
&gt;&gt;&gt; from _ast import *
&gt;&gt;&gt; dir()
['AST', 'Add', 'And', 'Assert', 'Assign', ...]
</code></pre>

<p>ast is a python module. So... what's happening here? I tried with an empty os.py and didn't work.</p>
