out = open('nesting.py', 'w')
out.write("""
import sys
def func0():
    try:
        return func0()
    except RuntimeError:
        return sys.exc_info()
""")
x = 0
for x in range(1, 100):
    out.write("""
def func%i():
    try: return func%i()
    except RuntimeError:  return func%i()
""" % (x,x,x-1))

out.close()
from nesting import *
func1()
func5()
func15()
func20()
func30()