a = ["football", "baseball", "hockey", "swimming"]
for (index,item) in enumerate(a):
    print (index,item)
    
(0, 'football')

(1, 'baseball')

(2, 'hockey')

(3, 'swimming')


z = enumerate(a)
print z
<enumerate object at 0x0000000003E222D0>


for (c,d) in z:
    print c,d
    
0 football

1 baseball

2 hockey

3 swimming


for (index,item) in z:
    print index,item

# note nothing printed
    
for w in enumerate(a):
    print w
    
(0, 'football')

(1, 'baseball')

(2, 'hockey')

(3, 'swimming')


for w in enumerate(a):
    print w[0]
    
0

1

2

3