Subprocess command with pipes exception

Chạy ví dụ check_output được cung cấp trong VS Code Jupyter notebook trên Windows, sau đó so sánh với một terminal Python thông thường. Theo dõi hành vi của subprocess xung quanh pipe và xác minh rằng lệnh hoàn tất mà không có FileNotFoundError và hiển thị đầu ra của nó.

When running a system command in ipyterminal exceptions being thrown and no output being displayed. However, when running in a normal python terminal, there are no issues. Running python 3.8.3. Running ipyterminal in vs code jupyter notebook.

from subprocess import run, PIPE, Popen, check_output
cmd = "ls | grep test"
output = check_output(cmd)
print(output.decode('utf-8'))

Error in ipyterminal

FileNotFoundError Traceback (most recent call last)
C:\Temp/ipykernel_13876/3338296859.py in
1 from subprocess import run, PIPE, Popen, check_output
2 cmd = "ls | grep test"
----> 3 output = check_output(cmd)
4 #print(output.stdout.decode('utf-8'))

c:\Users\S279376\Miniconda3\envs\analytics\lib\subprocess.py in check_output(timeout, *popenargs, **kwargs)
413 kwargs['input'] = empty
414
--> 415 return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
416 **kwargs).stdout
417

c:\Users\S279376\Miniconda3\envs\analytics\lib\subprocess.py in run(input, capture_output, timeout, check, *popenargs, **kwargs)
491 kwargs['stderr'] = PIPE
492
--> 493 with Popen(*popenargs, **kwargs) as process:
494 try:
495 stdout, stderr = process.communicate(input, timeout=timeout)

c:\Users\S279376\Miniconda3\envs\analytics\lib\subprocess.py in init(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags, restore_signals, start_new_session, pass_fds, encoding, errors, text)
856 encoding=encoding, errors=errors)
857
...
-> 1311 hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
1312 # no special security
1313 None, None,

FileNotFoundError: [WinError 2] The system cannot find the file specified