from //kogs-www.informatik.uni-hamburg.de/~meine/python_tricks

while True:
do_something()
if condition():
break

Godspeed :)

Editors note:

Much thanks! Your code is very helpful (and efficient too!) :)

However, in defining "find_key", shouldn't you use the argument "dic" instead of "symbol_dic" in calling iteritems? :)

Other than...