#!/usr/bin/env python

"""

recursion in an interactive loop

This code will work -- but not a great idea!

"""

import sys

def mainloop():

while True:

ans = input('type "a", "b", or "quit"')

if ans == "a":

print("you typed a")

elif ans == "b":

second_loop()

elif ans[0] == "q":

print("quitting")

# break

sys.exit() # what if I use the break, rather than the exit()?

elif ans[0] == "r": # here to test recursion...

raise Exception()

# else: # no expected response -- start the loop again

# mainloop()

def second_loop():

while True:

ans = input('type "a", "b", or "go back')

if ans == "a":

print("you typed a")

elif ans == "b":

second_loop()

elif ans[0] == "g":

return

if __name__ == "__main__":

mainloop()