Os Memory Stack Overflow

In this tutorial, you'll learn about How to Fix Stack Overflow Errors. We cover key concepts, practical examples, and best practices.

Fix stack overflow errors when deep recursion without tail-call optimization exhausts stack.

Quick Fix

Wrong

def recurse(n):
    if n==0: return 0
    return 1+recurse(n-1)
recurse(20000)

Recursion depth 20000 exceeds Python default recursion limit (~1000). Stack overflow.

Right

import sys
sys.setrecursionlimit(50000)
def recurse(n):
    if n==0: return 0
    return 1+recurse(n-1)
print(recurse(20000))  # 20000
# Better: use iteration
def iter_fact(n):
    res=0
    for i in range(n): res+=1
    return res

20000 printed with increased recursion limit. Iteration avoids stack growth entirely.

Prevention

Prefer iteration over recursion for unbounded depth. Increase recursion limit only as last resort.

DodaTech Tools

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