Dear all, 

When seeking to put an object of type -- Array of object -- into shared memory when doing multiprocessing via starmap, I am encountering problems -- in that sense that the program does not finish running but apparently gets stuck. 

I attached a minimal example. 

Many thanks for your help. I sincerely hope I have not overlooked that this issue has been raised by somebody else. I am happy to provide further input!

Cheers, 

Hannah

This looks like a numpy usage question, not a python bug. I suggest you ask on Stackoverflow or a numpy user forum.

Hi Eric,

Thanks for your quick reply. The numpy operation was only an attempt to serialize the nested list and make it available as a shared memory object.  As is written in the documentation, the SharedList() does not take nested lists as an input. 

I posed the question as well on Stackoverflow with a slightly longer example. Feel free to check it out: https://stackoverflow.com/questions/66138235/multiprocessing-with-array-of-objects-in-shared-memory. 

Thanks again. 

Cheers, 

Hannah

If you could demonstrate the problem without numpy, then we could probably help you here. I don't know much about numpy.