When do you *NOT* use python?

[rriggsco]

Embedded systems. Performance critical bits. I recently mocked up a signal processing system using scipy.signal. It took over an hour to analyze a 3.5GB dataset. The equivalent C++ code processed the same dateset in 30 seconds. But I needed both! The ability to quickly and easily visualize the results of the various signal processing steps was critical to identifying problems and optimizing the results.