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+--- Thread: Ouestion on Python Loop (/thread-1502.html)
Ouestion on Python Loop - GOPI56 - Jan-08-2017
Hi All,
I have a question on this python which i have attached below. My question is i want the python script "PIRoncall.py" script to be run once but i want the read file loop to continue,currently it keeps on duplicating and there is mutiple process of "PIRoncall.py" script. I have thought of using shell command for checking process existence (pgrep?) before launching PIRoncall.py instance but i am not sure how to proceed. Anyone please help ?
import time
import subprocess
import os
oldline="none"
while True:
fh=open("status_mjpeg.txt","r")
line = fh.read(5)
print line
fh.close()
time.sleep(0.3)
if oldline !=line:
if line == "md_re":
print "on"
time.sleep(0.2)
os.system(' /usr/bin/python PIRoncall.py &')
time.sleep (2)
elif line == "ready":
print "on"
os.system(' /usr/bin/python PIRoffcall.py')
time.sleep(2)
oldline = line
RE: Ouestion on Python Loop - Windspar - Jan-08-2017
You are open and closing file in loop. So file reset it back to beginning.
import time
import subprocess
import os
def main():
oldline="none"
fh=open("status_mjpeg.txt","r")
while True:
line = fh.read(5)
print line
if(line == ""):
break
time.sleep(0.3)
if oldline !=line:
if line == "md_re":
print "on"
time.sleep(0.2)
os.system(' /usr/bin/python PIRoncall.py &')
time.sleep (2)
elif line == "ready":
print "on"
os.system(' /usr/bin/python PIRoffcall.py')
time.sleep(2)
oldline = line
fh.close()
main()
RE: Ouestion on Python Loop - buran - Jan-08-2017
Any particular reason no to import the RIPoncall and use it?