列表推导式作业运行失败
1 matrix=[2
3 ]
4 diag = for i in range(len(matrix))]
5 print(diag)
不知道为什么运行不了
vscode的运行显示如下，看不太懂为什么出问题，感谢帮助！
PS C:\Users\Administrator\Desktop>c:; cd 'c:\Users\Administrator\Desktop'; & 'c:\Users\Administrator\AppData\Local\Programs\Python\Python310\python.exe' 'c:\Users\Administrator\.vscode\extensions\ms-python.debugpy-2024.0.0-win32-x64\bundled\libs\debugpy\adapter/../..\debugpy\launcher' '60180' '--' 'c:\Users\Administrator\AppData\Local\Temp\Rar$DIa5692.45949\x = 1.py'
c:\Users\Administrator\AppData\Local\Temp\Rar$DIa5692.45949\x = 1.py:1: SyntaxWarning: list indices must be integers or slices, not tuple; perhaps you missed a comma?
matrix=[
Traceback (most recent call last):
File "c:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 196, in _run_module_as_main
return _run_code(code, main_globals, None,
File "c:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 86, in _run_code
exec(code, run_globals)
File "c:\Users\Administrator\.vscode\extensions\ms-python.debugpy-2024.0.0-win32-x64\bundled\libs\debugpy\__main__.py", line 39, in <module>
cli.main()
File "c:\Users\Administrator\.vscode\extensions\ms-python.debugpy-2024.0.0-win32-x64\bundled\libs\debugpy/..\debugpy\server\cli.py", line 430, in main
run()
File "c:\Users\Administrator\.vscode\extensions\ms-python.debugpy-2024.0.0-win32-x64\bundled\libs\debugpy/..\debugpy\server\cli.py", line 284, in run_file
runpy.run_path(target, run_name="__main__")
File "c:\Users\Administrator\.vscode\extensions\ms-python.debugpy-2024.0.0-win32-x64\bundled\libs\debugpy\_vendored\pydevd\_pydevd_bundle\pydevd_runpy.py", line 321, in run_path
return _run_module_code(code, init_globals, run_name,
File "c:\Users\Administrator\.vscode\extensions\ms-python.debugpy-2024.0.0-win32-x64\bundled\libs\debugpy\_vendored\pydevd\_pydevd_bundle\pydevd_runpy.py", line 135, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "c:\Users\Administrator\.vscode\extensions\ms-python.debugpy-2024.0.0-win32-x64\bundled\libs\debugpy\_vendored\pydevd\_pydevd_bundle\pydevd_runpy.py", line 124, in _run_code
exec(code, run_globals)
File "c:\Users\Administrator\AppData\Local\Temp\Rar$DIa5692.45949\x = 1.py", line 1, in <module>
matrix=[
TypeError: list indices must be integers or slices, not tuple 看到你的代码问题啦！主要错误是矩阵定义不完整和推导式缺少核心表达式。修改后的代码如下：
matrix = [
,
,
]
diag = for i in range(len(matrix))]
print(diag)# 输出：
错误原因解析：
1. 矩阵定义不完整：你只写了 matrix= 和 ]，中间缺少实际数据
2. 推导式缺少核心：漏写了 matrix 这个关键表达式
3. 索引方式错误：二维数组应该用 matrix 而不是 matrix
错误日志关键点：
TypeError: list indices must be integers or slices, not tuple
这个错误是因为你尝试用元组(如 (i,i))当索引，而列表只接受整数索引
正确写法要点：
- 矩阵每行用逗号分隔，如：
- 推导式结构： [元素 for 循环]
- 对角线元素位置：行索引=列索引
试试这个修正版，应该能正确输出对角线元素啦！
以上回复来自 FishC AI 小助理，如未能正确解答您的问题，请继续追问。 1、2每行后加个逗号，因为外面也是个大列表 ，，是matrix列表里的三个元素，每个元素需要用" , "隔开
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