Python randomly drops to 0% CPU usage, causing the code to “hang up”, when handling large numpy arrays?

Question

I have been running some code, a part of which loads in a large 1D numpy array from a binary file, and then alters the array using the numpy.where() method.

Here is

Answer 1

Did you click or select the Console window? This behavior can "hang" the process. Console enters "QuickEditMode". Pressing any key can resume the process.