python3 os.system() 突然不能调用dos命令
![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/214436423996155.png "#le
```python
C:\Users\J01058253>python
Python 3.12.0 (tags/v3.12.0:0fb18b0, Oct 2 2023, 13:03:39) [MSC v.1935 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import subprocess
>>> subprocess.call('cmd /c dir', shell=True)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Program Files\Python312\Lib\subprocess.py", line 389, in call
with Popen(*popenargs, **kwargs) as p:
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python312\Lib\subprocess.py", line 1026, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "C:\Program Files\Python312\Lib\subprocess.py", line 1538, in _execute_child
hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [WinError 2] 系统找不到指定的文件。
>>> import os
>>> os.system('dir')
-1
>>> os.system(r'C:\Windows\System32\calc.exe')
-1
>>>
```