L = ['Adam', 'Lisa', 'Bart', 'Paul']
for index, name in enumerate(L):
index = index + 1
print index, '-', name
L = ['Adam', 'Lisa', 'Bart', 'Paul']
for t in zip(range(1, len(L) + 1), L):
index = t[0]
name = t[1]
print index, '-', name
这样也可以
for x in [ '1','2','3','4','5','6','7','8','9' ]:
for y in [ '1','2','3','4','5','6','7','8','9' ]:
if x<y:
print x+y
s = set(['Adam', 'Lisa', 'Paul'])
L = ['Adam', 'Lisa', 'Bart', 'Paul']
i = 0
for name in L:
if L[i] in s:
s.remove(L[i])
else:
s.add(L[i])
i = i + 1
print s
