> ValueError: cannot set recursion limit to 2: the minimum recursion limit is 1 at the recursion depth 1 This message looks confusing to me. 2 > 1, isn't? The dependency of min_limit from new_limit is not monotonic: new_limit = 99 => min_limit = 74 new_limit = 100 => min_limit = 75 new_limit = 101 => min_limit = 51