enumerate
if __name__ == '__main__':
a = [1234, 2234, 3234, 4234, 5234, 6234]
for i, j in enumerate(a):
print i,j
输出
0 1234
1 2234
2 3234
3 4234
4 5234
5 6234
if __name__ == '__main__':
a = [1234, 2234, 3234, 4234, 5234, 6234]
for i, j in enumerate(a):
print i,j
输出
0 1234
1 2234
2 3234
3 4234
4 5234
5 6234