What is the maximum recursion depth in Python, and how to increase it? -

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i have tail recursive function here:

def fib(n, sum):     if n < 1:         return sum     else:         return fib(n-1, sum+n)  c = 998 print(fib(c, 0))

it works n=997, breaks , spits "maximum recursion depth exceeded in comparison" runtimeerror. stack overflow? there way around it?

it guard against stack overflow, yes. python (or rather, cpython implementation) doesn't optimize tail recursion, , unbridled recursion causes stack overflows. can change recursion limit sys.setrecursionlimit, doing dangerous -- standard limit little conservative, python stackframes can quite big.

python isn't functional language , tail recursion not particularly efficient technique. rewriting algorithm iteratively, if possible, better idea.


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