使用 Python 在 Raspberry Pi 上运行 ARP 扫描

Question

I am trying to run an ARP-scan on my raspberry Pi from a Python script.

I have tried the following code using the subprocess library, however when I attempt to print output I receive the error that there is no such variable

p = subprocess.Popen(" sudo arp-scan -l", stdout=subprocess.PIPE, shell=True)
(output, err) = p.communicate()
status = p.wait()

print(output)
print(err)

Is anyone able to tell me what I am doing wrong?

Many thanks in advance

Answer 1

Try like this:

import subprocess

p = subprocess.run("sudo /usr/sbin/arp-scan -l", shell=True, capture_output=True)
print(p.stdout)

Answer 2

I have been a bit stupid. I was testing these commands on a Python terminal on my pi and it would not print output. However when I save this as a script and execute it, it works as it should. Thanks for the help