Follow current recommended practice in an example: Use isinstance() to

perform a type test instead of type(x) == types.FoobarType.  In example
for type().

Doc/lib/libfuncs.tex

@@ -606,7 +606,7 @@ For instance:
 
 \bcode\begin{verbatim}
 >>> import types
->>> if type(x) == types.StringType: print "It's a string"
+>>> if isinstance(x, types.StringType): print "It's a string"
 \end{verbatim}\ecode
 \end{funcdesc}