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    <pre><code>import lxml.html as LH doc = LH.parse('http://somesite') </code></pre> <p><code>lxml.html</code> is a module. When you <code>import lxml</code>, the <code>html</code> module is not imported into the <code>lxml</code> namespace. This is a developer's decision. Some packages automatically import some modules, some don't. In this case, you have to do it yourself with <code>import lxml.html</code>.</p> <p><code>import lxml.html as LH</code> imports the <code>html</code> module and binds it to the name <code>LH</code> in the current module's namespace. So you can access the parse function with <code>LH.parse</code>.</p> <hr> <p>If you want to delve deeper into when a package (like <code>lxml</code>) imports modules (like <code>lxml.html</code>) automatically, open a terminal and type</p> <pre><code>In [16]: import lxml In [17]: lxml Out[17]: &lt;module 'lxml' from '/usr/lib/python2.7/dist-packages/lxml/__init__.pyc'&gt; </code></pre> <p>Here is you see the path to the <code>lxml</code> package's <code>__init__.py</code> file. If you look at the contents you find it is empty. So no submodules are imported. If you look in numpy's <code>__init__.py</code>, you see lots of code, amongst which is </p> <pre><code>import linalg import fft import polynomial import random import ctypeslib import ma </code></pre> <p>These are all submodules which are imported into the <code>numpy</code> namespace. So from a user's perspective, <code>import numpy</code> automatically gives you access to <code>numpy.linalg</code>, <code>numpy.fft</code>, etc.</p>
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    1. COBut explain why it works.
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    2. COShould I think of lxml as a package, then? Is there any consistent way to figure out what modules are automatically loaded into my program?
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    3. CO@TravisLelue: In Python a directory which contains an `__init__.py` is a package. Thus, `lxml` is a package. A module is any `.py` file inside a package. My edit (hopefully) explains how you can find out what modules automatically get imported into a package's namespace.
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