MultiplyDefined.qhelp

<!DOCTYPE qhelp PUBLIC
  "-//Semmle//qhelp//EN"
  "qhelp.dtd">
<qhelp>


<overview>
<p> Multiple assignments to a single variable without an intervening usage makes the first assignment redundant.
Its value is lost.
</p>

</overview>
<recommendation>
<p>Ensure that the second assignment is in fact correct.
Then delete the first assignment (taking care not to delete right hand side if it has side effects).</p>

</recommendation>
<example>
<p>In this example, <code>x</code> is assigned the value of 42 but then the value is changed to 12
before <code>x</code> is used. This makes the first assignment useless.</p>
<sample src="MultiplyDefined.py" />

</example>
<references>

    <li>Python: <a href="http://docs.python.org/reference/simple_stmts.html#assignment-statements">Assignment statements</a>.</li>

</references>
</qhelp>