When it performs a Python call, CPython performs a corresponding recursive call of the interpreter function. It uses both the C stack to manage interpreter stat

When it performs a Python call, CPython performs a corresponding recursive call of the interpreter function. It uses both the C stack to manage interpreter state and heap-allocated stack frame objects to manage the interpreted program's state. Your experiment shows that the C stack overflows faster than the heap. It does not show that no heap space is consumed at all.