mirror of
https://github.com/github/codeql.git
synced 2025-12-25 13:16:33 +01:00
37 lines
1.1 KiB
XML
37 lines
1.1 KiB
XML
<!DOCTYPE qhelp PUBLIC
|
|
"-//Semmle//qhelp//EN"
|
|
"qhelp.dtd">
|
|
<qhelp>
|
|
|
|
<overview>
|
|
<p>This global variable may not be defined.
|
|
If this code is executed and the variable is undefined then a <code>NameError</code> will occur.
|
|
</p>
|
|
|
|
</overview>
|
|
<recommendation>
|
|
|
|
<p>Check that the name of the global variable is not a typographic error. If the name is correct
|
|
then define the variable or import the module that defines the function or method.</p>
|
|
|
|
<p>If it is expected this variable will be initialized from another module before it is used, then the <code>NameError</code> may not occur.
|
|
Nonetheless, the code will be more robust and clearer if the variable is set to a default value in its own module.
|
|
</p>
|
|
|
|
</recommendation>
|
|
<example>
|
|
<p>The following examples show two different examples of undefined "global variables".</p>
|
|
|
|
<sample src="UndefinedGlobal.py" />
|
|
|
|
|
|
</example>
|
|
<references>
|
|
|
|
<li>Python Standard Library: <a href="https://docs.python.org/library/exceptions.html#exceptions.NameError">NameError</a>.</li>
|
|
<li>The Python Tutorial: <a href="http://docs.python.org/2/tutorial/modules.html">Modules</a>.</li>
|
|
|
|
|
|
</references>
|
|
</qhelp>
|