在python中使用枚举时无法迭代到多个列表

Question

I wanted to print each value in the list below. I also need to know the index. so I wanted to use enumarate:

a = [(10, 0, 3), (10, 10, 6), (10, 15, 4), (10, 20, 5), (10, 3, 3),
         (10, 5, 6), (10, 0, 3), (10, 10, 3), (10, 40, 6), (10, 45, 5), (10, 50, 6)]

for i, measurment in enumerate(a):
        for a,b,c in measurment:
            print( a,b,c)

But unfortunately i am having this error: 'int' object is not iterable.

Answer 1

No need for the nested loop, you can unpack directly:

a = [(10, 0, 3), (10, 10, 6), (10, 15, 4), (10, 20, 5), (10, 3, 3),
         (10, 5, 6), (10, 0, 3), (10, 10, 3), (10, 40, 6), (10, 45, 5), (10, 50, 6)]

for i, (a, b, c) in enumerate(a):
    print(i, a, b, c)

Output

0 10 0 3
1 10 10 6
2 10 15 4
3 10 20 5
4 10 3 3
5 10 5 6
6 10 0 3
7 10 10 3
8 10 40 6
9 10 45 5
10 10 50 6