NameError when trying to use the SIGHUP signal

Question

I wanted to catch a SIGHUP signal in my Python program. But I ran into the problem that Python doesn't recognize the signal name:

import signal
import time

def handler(sig, frame):
  print("SIGNAL:", sig)


signal (SIGHUP, handler)

while True:
  time.sleep(1)

Python does not recognize SIGHUP and gives an error. Anyone knows how to fix it?

Given this import statement you would have to use `signal.SIGHUP`, not `SIGHUP`, and `signal.signal`, not `signal`. — mkrieger1, May 15 '20 at 06:56
See https://stackoverflow.com/questions/9439480/from-import-vs-import — mkrieger1, May 15 '20 at 08:48

score 3 · Accepted Answer · answered May 15 '20 at 06:49

3

In python you have to explicitly import the signals themselves. This should work:

from signal import signal, SIGHUP
import time 

def handler(sig, frame):
  print("SIGNAL:", sig) 

signal (SIGHUP, handler) 

while True: 
  time.sleep(1)

answered May 15 '20 at 06:49

user9102437

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NameError when trying to use the SIGHUP signal

1 Answers1