timeout value in subprocess

[snippsat]

Timeout is a parameter in the function call,just set time there.

from subprocess import check_output

out = check_output(['ping', 'google.com'], timeout=5)
print(out.decode('utf-8').strip())

Output:
Pinging google.com [172.217.22.174] with 32 bytes of data:
Reply from 172.217.22.174: bytes=32 time=26ms TTL=56
Reply from 172.217.22.174: bytes=32 time=22ms TTL=56
Reply from 172.217.22.174: bytes=32 time=23ms TTL=56
Reply from 172.217.22.174: bytes=32 time=25ms TTL=56

Ping statistics for 172.217.22.174:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 22ms, Maximum = 26ms, Average = 24ms

Here it goes fine because the process finish before 5-sec.

from subprocess import check_output
import subprocess

out = check_output(['ping', '-n', '10', 'google.com'], timeout=5)
print(out.decode('utf-8').strip())

Error:
Traceback (most recent call last):
  File "C:\Python36\lib\subprocess.py", line 405, in run
  ........
subprocess.TimeoutExpired: Command '['ping', '-n', '10', 'google.com']' timed out after 5 seconds

Here it use longer than 5-sec,and get a subprocess.TimeoutExpired,
This error be catch an give a better message.

from subprocess import check_output

try:
    out = check_output(['ping', '-n', '10', 'google.com'], timeout=5)
    print(out.decode('utf-8').strip())
except subprocess.TimeoutExpired:
    print('Process ran too long and got timed out')

Output:
Process ran too long and got timed out