list index out of range

Question

```python
if __name__ == '__main__':
    list1 = []
    for i in range(10):
        list2 = []
        if i == 0:
            list2 = [1]
        elif i == 1:
            list2 = [1, 1]
        else:
            for j in range(i + 1):
                if j == 0 or j == i:
                    list2.append(1)
                else:
                    list2.append(list1[i - 1][j - 1] + list1[i - 1][j])
    list1.append(list2)
    print(list1)

```

Answer 1

• 这有个类似的问题, 你可以参考下: https://ask.csdn.net/questions/7676171
• 这篇博客你也可以参考下：IndexError: list index out of range列表索引超出范围