This is one of the errors that im getting
Traceback (most recent call last):
File "<pyshell#49>", line 1, in <module>
t.insert(5)
File "/Users/stevenbauer/Desktop/AVL.py", line 68, in insert
stack.append(current)
NameError: global name 'stack' is not defined-- http://mail.python.org/mailman/listinfo/python-list
