why subprocess.check_output raise an error CalledProcessError - python-3.x

Question

I tried lot of different way but i can't figure out this problem..i am not expert in python can any one explain how can i solve this problem...plzzz
command = "netsh wlan show profile"
ssid = subprocess.check_output(command, shell=True)
ssid = ssid.decode("utf-8")
ssid_list = re.findall('(?:Profile\s*:\s)(.*)', ssid)
for ssid_name in ssid_list:
subprocess.check_output(["netsh","wlan","show","profile",ssid_name,"key=clear"])
and it gives error:
Traceback (most recent call last):
File "C:/Users/Prakash/Desktop/Hacking tool/Execute_sys_cmd_payload.py", line 18, in <module>
subprocess.check_output(["netsh","wlan","show","profile",ssid_name,"key=clear"])
File "C:\Users\Prakash\AppData\Local\Programs\Python\Python38\lib\subprocess.py", line 411, in check_output
return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
File "C:\Users\Prakash\AppData\Local\Programs\Python\Python38\lib\subprocess.py", line 512, in run
raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['netsh', 'wlan', 'show', 'profile', 'Prakash_WiFi\r', 'key=clear']' returned non-zero exit status 1.
Process finished with exit code 1

Answer 1

With check_output this exception will be raised whenever a command extis abnormally, as indicated by a non-zero return code.
A possible solution is to use subprocess.run instead. This will run the process and return a CompletedProcess instance, which has a returncode attribute that you can check;
import subprocess as sp
command = ["netsh","wlan","show",ssid_name,"key=clear"]
netsh = subprocess.run(command, shell=True, stdout=sp.PIPE)
if netsh.returncode != 0:
print(f'netsh error: {netsh.returncode}')
else:
# process netsh.stdout.
From reading this page, it seems that the command you should use is netsh wlan show (without profile).