Python 3.8.3 : Simple example to fix maximum recursion depth exceeded.

This short tutorial try to solve simple and easy the stack limit for recursion without using advanced programming techniques.

sys.setrecursionlimit(limit)
    Set the maximum depth of the Python interpreter stack to limit. 
This limit prevents infinite recursion from causing an overflow of the C stack 
and crashing Python.

This can be done in most cases with:

import sys
sys.setrecursionlimit(1976)

Let's test with an simple example for a given number.

input_number = 1234567890987654321

I create a script for the next function to print the result:

def split_input(n):
    return split_input(n // 10) + [n % 10]

The result of this function is:

python flow_001.py
Traceback (most recent call last):
  File "flow_001.py", line 12, in 
    input_list = split_input(input_number)
  File "flow_001.py", line 10, in split_input
    return split_input(n // 10) + [n % 10]
  File "flow_001.py", line 10, in split_input
    return split_input(n // 10) + [n % 10]
  File "flow_001.py", line 10, in split_input
    return split_input(n // 10) + [n % 10]
  [Previous line repeated 996 more times]
RecursionError: maximum recursion depth exceeded

You can see I got an error. Let fix this function with a proper source code:

def split_nr(n):
    if n < 1:
        return [n]
    else:
        return split_nr(n // 10) + [n % 10] 

This will solve the recursion split function.

python flow_001.py
[1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 9, 8, 7, 6, 5, 4, 3, 2, 1]