Limit recursion with a context handler

recursion_limiter.py

import sys, collections

class max_stack_level:
	active = collections.Counter()

	def __init__(self, max):
		self.max = max

	def __enter__(self):
		frame = sys._getframe(1)
		self.tag = frame.f_code, frame.f_lineno
		self.active[self.tag] += 1
		if self.active[self.tag] >= self.max:
			raise RecursionError(f'Recursion limited by {self}')
		return self

	def __exit__(self, e, et, tb):
		self.active[self.tag] -= 1

def my_thing():
	print('MyThing!')
	with max_stack_level(3):
		my_thing()

my_thing()