hi,
i'm novice user in python and i want to capture data at a specific port using python script.Please suggest me the approach.

Same data i'm able to write into a file using linux command:
tethereal -i any "port 9060" -w sam.txt

I want to accomplish the above task using python script.


Thanks in Advance,
bharat.

I suggest a subprocess, like this

from subprocess import Popen, PIPE
tethereal = Popen('tethereal -i any "port 9060"', shell=True, stdout=PIPE)
while True:
    data = tethereal.stdout.read(1024)
    if data == '':
        break
    print data

Hi,

I need to get the gps receiver data....by using telnet

when i am enter the below command in terminal(UBUNTU 8.10):

"telnet localhost 2947" its giving the data like below in terminal..
Trying 127.0.0.1...
Connected, to localhost.
Escape character is '^]'.
r (here if i press r and enter the the below data will come on terminal)
GPSD,R=1
$GPGSV,3,1,11,08,16,328,40,11,36,127,00,28,33,283,39,20,11,165,00*71
$GPGSV,3,2,11,17,24,208,39,27,11,097,00,13,87,174,00,19,31,042,00*70
$GPGSV,3,3,11,25,43,033,38,03,07,037,00,23,47,150,00*44
$GPGGA,111503,0833.6323,N,07652.7685,E,1,04,1.60,16.69,M,-94.088,M,,*58
$GPRMC,111503,A,0833.6323,N,07652.7685,E,0.1866,256.540,220609,,*2A
-
-
-
when i am using above script....

1 #!/usr/bin/env python
2
3 from subprocess import Popen, PIPE
4
5 gpsreceiver = Popen('telnet localhost 2947', shell=True, stdout=PIPE)
6 while True:
7 data = gpsreceiver.stdout.read(1024)
8 if data == '':
9 break
10 print data

its giving all the log...but what i need, i need to read each line, if the line is start with $GPRMC...that has to copy into newfile.
in the above,
$GPRMC,111503,A,0833.6323,N,07652.7685,E,0.1866,256.540,220609,,*2A
line has to open file gps.txt and save it.
Please help me how to do it?

Thanks,

sincerely,
sravan

You could use the startsWith() method on data to ascertain whether or not the stuff in data starts with $GPRMC?

New code:

from subprocess import Popen, PIPE
tethereal = Popen('tethereal -i any "port 9060"', shell=True, stdout=PIPE)
while True:
    data = tethereal.stdout.read(1024)
    if data == '':
        break
    else if data.startsWith("$GPRMC"):
        print data

That should do the trick, but no guarantees - a little shaky on my Python. I don't know what the tethereal.stdout.read(1024) puts into data so I can't be 100% sure if the startsWith() method will work but give it a try.

Good luck to you!

Regards,
George.

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