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35 lines
1.0 KiB
XML
35 lines
1.0 KiB
XML
<!DOCTYPE qhelp PUBLIC
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"-//Semmle//qhelp//EN"
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"qhelp.dtd">
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<qhelp>
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<overview>
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<p>Passing a local variable to a <code>del</code> statement results in that
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variable being removed from the local namespace. When exiting a function all
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local variables are deleted, so it is unnecessary to explicitly delete variables
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in such cases.</p>
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</overview>
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<recommendation>
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<p>Remove the <code>del</code> statement.</p>
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</recommendation>
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<example>
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<p>
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In the function below, the variable <code>x</code> is assigned a value that
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is used for a calculation, and is then explicitly deleted before the
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function exits. In this case, the delete statement can be removed without
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changing the behavior of the function.
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</p>
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<sample src="UnnecessaryDelete.py" />
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</example>
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<references>
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<li>Python: <a href="https://docs.python.org/2/reference/simple_stmts.html#the-del-statement">The 'del' statement</a>.</li>
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<li>Python/C API Reference Manual: <a href="https://docs.python.org/2.0/api/refcounts.html">Reference counts</a>.</li>
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</references>
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</qhelp>
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