<!DOCTYPE qhelp PUBLIC

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

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<qhelp>

<overview>

<p>A lambda that calls a function without modifying any of its parameters is unnecessary.

Python functions are first class objects and can be passed around in the same way as the resulting lambda.

</p>

</overview>

<recommendation>

<p>Remove the lambda, use the function directly.</p>

</recommendation>

<example>

<p>In this example a lambda is used unnecessarily in order to pass a method as an argument to <code>

call_with_x_squared</code>.</p>

<sample src="UnnecessaryLambda.py" />

<p>This is not necessary as methods can be passed directly. They behave as callable objects.</p>

<sample src="UnnecessaryLambdaFix.py" />

</example>

<references>

<li>Python: <a href="http://docs.python.org/2.7/reference/expressions.html#lambda">lambdas</a>.</li>

</references>

</qhelp>