MismatchInMultipleAssignment.qhelp

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


<overview>
<p> An assignment statement evaluates a sequence expression and assigns each item of the sequence to 
one of the variables on the left. If there is a mismatch between the number of variables on
the left and the values in the sequence on the right of the statement, then an exception is raised 
at runtime.
</p>

</overview>
<recommendation>
<p>Ensure that the number of variables on either side of the assignment match.</p>

</recommendation>
<example>
<p>The following examples show a simple definition of the Fibonacci series. In the first example, 
one of the values in the assignment has been duplicated, causing an exception at runtime.</p>
<sample src="MismatchInMultipleAssignment.py" />


</example>
<references>

<li>Python Language Reference: <a href="http://docs.python.org/2/reference/simple_stmts.html#grammar-token-assignment_stmt">
Assignment statements</a>.</li>
<li>Python Tutorial: <a href="http://docs.python.org/2/tutorial/introduction.html#first-steps-towards-programming">
First steps towards programming</a>.</li> 


</references>
</qhelp>