"No such file or directory"对应的Exception名称？

Question

想问下try: except:中是否有异常名称出现错误No such file or directory.

例如：

try:
    subprocess.run(["bash", my_path + "start.sh"], shell=False)
except NoDirectory:
    print('Error: This directory was not found. Please make sure the path is correct')

或者有没有办法从 subprocess.run 获取错误代码并从那里进行检查？

Answer 1

我无法在您的代码中捕捉到 bash 异常，正如它所写的那样。但是你可以尝试下面的代码，即使它更长。您还可以发送一组命令，而不是一次发送一个命令：

NOTE - Tested on Ubuntu 20.04, using Python 3.8

commands = ("bash start.sh", "date",)
for c in commands:
    p = subprocess.Popen(shlex.split(c), stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
    output, error = p.communicate()
    rc = p.returncode
    if rc != 0:
        if error.find(b"No such file or directory"):
            print("Error: This directory was not found. Please make sure the path is correct")
        else:
            print(error.decode().strip())
    else:
        print(output.decode().strip())

输出：

Error: This directory was not found. Please make sure the path is correct
Wed 29 Dec 2021 06:10:15 PM EST

如果有人想出如何使用 subprocess 从 bash 捕获 No such file or directory，我将非常感兴趣。

Answer 2

使用 stderr=subprocess.PIPE 参数以便检查错误输出。

import subprocess

r = subprocess.run(['bash', '/some/nonexistent/path.sh'], stderr=subprocess.PIPE)

if r.returncode:
    if b'No such file or directory' in r.stderr:
        print('That file was not found.')

"No such file or directory"对应的Exception名称？

Name of Exception corresponding to "No such file or directory"?

python

bash

subprocess

try-catch

python-3.10