\begin{lstlisting}
>>> import cv
>>> im = cv.LoadImageM("building.jpg", 1)
->>> dst = cv.CreateImage(cv.GetSize(im), cv.IPL_DEPTH_16S, 3);
+>>> dst = cv.CreateImage(cv.GetSize(im), cv.IPL_DEPTH_16S, 3)
>>> laplace = cv.Laplace(im, dst)
>>> cv.SaveImage("foo-laplace.png", dst)
\end{lstlisting}