from Python
programs using the "<code>__doc__</code>" attribute: </p>

<div class="screen"><pre>
<code class="prompt">&gt;&gt;&gt;</code> <code class="user"><code class="keyword">print</code> x_intercept.__doc__</code><code class="output">
    Return the x intercept of the line y=m*x+b.  The x intercept of a
    line is the point at which it crosses the x axis (y=0).</code>
</pre></div>

<p> The <a href="http://web.lfw.org/python/pydoc.html">pydoc</a>
module, which became part of <a
href="http://www.python.