<!DOCTYPE qhelp PUBLIC

"-//Semmle//qhelp//EN"

"qhelp.dtd">

<qhelp>

<overview>

<p>When a module is imported using <code>import *</code>, all attributes listed in

<code>__all__</code> are imported. If <code>__all__</code> includes attributes that

are not defined in the module then an exception is triggered. This usually indicates

a typographic error in the attributes in <code>__all__</code> or in the name of the

object.</p>

</overview>

<recommendation>

<p>Correct any typographic errors, either in the name of the object or in the string in

<code>__all__</code>. If there are no typographic errors, either delete the name from

<code>__all__</code> or add the object to the module.</p>

</recommendation>

<example>

<p>

In the example, the function name <code>spam</code> has been misspelled in the <code>__all__</code> list.

This will result in <code>spamm</code> being highlighted as an undefined export.

Correcting the spelling will fix the defect.

</p>

<sample src="UndefinedExport.py" />

</example>

<references>

<li>Python Language Reference: <a href="http://docs.python.org/2/reference/simple_stmts.html#import">The import statement</a>.</li>

<li>Python Tutorial: <a href="http://docs.python.org/2/tutorial/modules.html#importing-from-a-package">Importing * from a Package</a>.</li>

</references>

</qhelp>