mirror of
https://github.com/github/codeql.git
synced 2025-12-24 04:36:35 +01:00
32 lines
987 B
XML
32 lines
987 B
XML
<!DOCTYPE qhelp PUBLIC
|
|
"-//Semmle//qhelp//EN"
|
|
"qhelp.dtd">
|
|
<qhelp>
|
|
|
|
<overview>
|
|
<p> A local variable is defined (by an assignment) but never used.
|
|
</p>
|
|
|
|
<include src="UnusedVariableNaming.inc.qhelp" />
|
|
<include src="UnusedTuple.inc.qhelp" />
|
|
|
|
</overview>
|
|
<recommendation>
|
|
<p>If the variable is included for documentation purposes or is otherwise intentionally unused, then change its name to indicate that it is unused,
|
|
otherwise delete the assignment (taking care not to delete right hand side if it has side effects).</p>
|
|
|
|
</recommendation>
|
|
<example>
|
|
<p>In this example, the <code>random_no</code> variable is never read but its assignment
|
|
has a side effect. Because of this it is important to remove only the left hand side of the
|
|
assignment in line 10.</p>
|
|
<sample src="UnusedLocalVariable.py" />
|
|
|
|
</example>
|
|
<references>
|
|
|
|
<li>Python: <a href="http://docs.python.org/2/reference/simple_stmts.html#assignment-statements">Assignment statements</a>.</li>
|
|
|
|
</references>
|
|
</qhelp>
|