import os import time from subprocess import Popen devnull = open(os.devnull, 'wb') p = [] # ip -> process for n in range(1, 10): # start ping processes ip = "192.168.0.%d" % n # p.append((ip, Popen(['ping', '-c', '3', ip], stdout=devnull))) p.append((ip, Popen(['ping',ip], stdout=devnull))) #NOTE: you could set stderr=subprocess.STDOUT to ignore stderr also while p: for i, (ip, proc) in enumerate(p[:]): if proc.poll() is not None: # ping finished p.remove((ip, proc)) # this makes it O(n**2) if proc.returncode == 0: print('%s active' % ip) elif proc.returncode == 2: print('%s no response' % ip) else: print('%s error' % ip) time.sleep(.04) devnull.close()
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