Lorenzo Thurman wrote:
> This is what I have so far:
>
> //
> #!/usr/bin/python
>
> import os
>
> cmd = 'ntpq -p'
>
> output = os.popen(cmd).read()
> //
>
> The output is saved in the variable 'output'. What I need to do next is
> select the line from that output that starts with the '*'
[snip]
> From there, I need to tokenize the line using the spaces as delimiters.
I use the subprocess module instead for better error reporting, but
basically if you just iterate over the file object, you'll get the lines.
import subprocess
# open the process
cmd = subprocess.Popen(['ntpq', '-p'], stdout=subprocess.PIPE)
# iterate over the file object until we see a line-initial "*"
line = None
for line in cmd.stdout:
if line.startswith('*'):
break
# make sure to catch the error if ntpq didn't produce any output
assert line is not None
# split the line into tokens (stolen from Tim Chase's answer
(remote, refid, st, t, when,
poll, reach, delay, offset, jitter) = line.split()
If you need to do this for each line that starts with a "*" instead of
just the first, move the line.split() code inside the for-loop.
STeVe
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