Popen - How can I read data before CTRL+C command is issued

[maffaz]

Cannot be done, you say ? This was done on Ubuntu

Output:
In [23]: ping_proc = subprocess.Popen(['ping', 'google.com'], 
    ...:                              stdout=subprocess.PIPE, stdin=subprocess.PIPE, 
    ...:                              stderr=subprocess.STDOUT, universal_newlines=True)

In [24]: for line_no, line in enumerate(ping_proc.stdout):
    ...:     print(line,)
    ...:     if line_no == 10:
    ...:         print('Killing process')
    ...:         ping_proc.kill()
    ...:         break
    ...:     
64 bytes from lhr25s10-in-f14.1e100.net (216.58.198.174): icmp_seq=3 ttl=50 time=66.0 ms

64 bytes from lhr25s10-in-f14.1e100.net (216.58.198.174): icmp_seq=4 ttl=50 time=66.1 ms

64 bytes from lhr25s10-in-f14.1e100.net (216.58.198.174): icmp_seq=5 ttl=50 time=66.3 ms

64 bytes from lhr25s10-in-f14.1e100.net (216.58.198.174): icmp_seq=6 ttl=50 time=66.0 ms

64 bytes from lhr25s10-in-f14.1e100.net (216.58.198.174): icmp_seq=7 ttl=50 time=66.2 ms

64 bytes from lhr25s10-in-f14.1e100.net (216.58.198.174): icmp_seq=8 ttl=50 time=66.1 ms

64 bytes from lhr25s10-in-f14.1e100.net (216.58.198.174): icmp_seq=9 ttl=50 time=66.1 ms

64 bytes from lhr25s10-in-f14.1e100.net (216.58.198.174): icmp_seq=10 ttl=50 time=66.2 ms

Killing process

I redirect stderr to stdout - some processes use stderr instead of stdout, so suppressing the former is a bad idea

I tried the above code.

With ping it worked as expected and with the tool I am using I got nothing until I pressed CTRL+C again.

any ideas are appreciated as I am pretty much out!!