Python:TypeError:列表索引必须是整数，而不是str [英] Python: TypeError: list indices must be integers, not str

问题描述

我将在Python上做矩阵加法.(未完成).但是它显示了一个错误.

I'm going to do Matrix Addition on Python.(Not finish). But it shows an error.

m, n = (int(i) for i in raw_input().split())
a = [[0 for i in range(m)] for j in range(n)]
b = [[0 for i in range(m)] for j in range(n)]
c = []
total = []

for i in range(m):
    x = raw_input()
    for j in range(n):
        value = [int(i) for i in x.split()]
    c[i][j] = a[i][j]
    #c.append(value)
print a
for i in c:
    print i

---

我要输入

---

I want to input

3 3<-矩阵维m * n

3 3 <-- matrix dimensional m*n

1 2 3>

3 2 1>矩阵A

3 2 1 > matrix A

1 3 2>

1 1 1>

1 1 1>矩阵B

1 1 1 > matrix B

1 1 1>

并显示为

2 3 4>

4 3 2>矩阵A + B

4 3 2 > matrix A + B

2 4 3>

推荐答案

您正在for外部循环中使用i，它是一个整数.然后在循环中，您可以:

You are using i in your outer for loop, and it is an int. Then in the loop you have:

value = [int(i) for i in x.split()]

使得i成为字符串(split返回的字符串).也许您认为[ ]内部存在某种范围界定?没有.您遇到名称冲突，请更改其中之一.

which makes i a string (which is what split returns). Maybe you think there is some sort of scoping inside [ ]? There isn't. You have a name collision, change one of them.

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