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

I would like to ask if there is an exception name in try: except: for the error No such file or directory.

For example:

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')

Or is there a way to get an error code from subprocess.run and to check it from there?

CodePudding user response：

I could not catch the bash exception in your code, as it is written. But you can try the following code, even if it's longer. You can also send a tuple of commands, instead of one command at a time:

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())

Output:

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

Very interested if someone figures out how to catch the No such file or directory from bash using subprocess.

CodePudding user response：

Use the stderr=subprocess.PIPE argument so you can examine the error output.

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.')