Symbian has a stack limit of 8kB. Does this also apply to the function calling in PyS60 apps?
There is a difference between python runtime and python apps. Also from PyS60 app developer point of view, it's the heapsize that's more interesting...
Version 1.9.5 comes by default with heapsize 100k min and 4M max. Of course you can define those by yourself when creating the SIS package to release and distribute your application.
Sorry if I answered right question with wrong answer (stack vs heap).
Stack is usually "enough", but with deep enough recursion you can run out of it. Have done it - and fixed some endless loops :) Never had any real stack problems. Usually it's the heap that runs out, esp with graphics manipulation.