Why does it return that 's' is not defined in the following example:

def hanoi (n,s,t,b):
assert n0
if n == 1:
print 'move', s, 'to', t
else
hanoi (n-1, s, b, t)
hanoi (n, s, t, b)
hanoi (n-1, b, t, s)

Question

Why does it return that 's' is not defined in the following example:

def hanoi (n,s,t,b):
     assert n>0
     if n == 1:
               print 'move', s, 'to', t
     else
               hanoi (n-1, s, b, t)
               hanoi (n, s, t, b)
               hanoi (n-1, b, t, s)

anonymous · Answer

btw I'm using python

anonymous · Answer

because you didn't define it...read http://docs.python.org/release/1.5.1p1/tut/functions.html (its for older python but you can get image of how to do).