[Tutor] scope problem?

[Peter Jakubowicz]

I'm probably doing something really dumb here, but I just wanted to test 
this bit of code to generate a list of the prime numbers from 2 to n; but I 
get an error message saying I haven't defined prime. But haven't I defined 
it in line 2?

def sieve(n):
     prime = [2]
     for i in range(2, n + 1):
         for j in range(2, n + 1):
             if i % j == 0:
                 pass
             else:
                 prime.append(i)
print prime