python system call

Question

having a difficult time understanding how to get python to call a system function...

the_file = ('logs/consolidated.log.gz')         
webstuff = subprocess.Popen(['/usr/bin/zgrep', '/meatsauce/', the_file ],stdout=subprocess.PIPE) % dpt_search
    for line in webstuff.stdout:
        print line

Trying to get python to build another file with my search string.

Thanks!

:) in perl, you would write system or qx ("/usr/bin/zgrep blah filename > output"); — Cmag
– Cmag, Commented Jun 21, 2011 at 21:23
You have a % in there. That is not where % could go, much less where it would go. — Ignacio Vazquez-Abrams
– Ignacio Vazquez-Abrams, Commented Jun 21, 2011 at 21:23

serverhorror · Accepted Answer · 2011-06-21 22:00:16Z

1

I recommend the PyMotW Subprocess page from Doug Hellmann who (quoted) "Reads the docs so you don't have to"

Apart from that:

f = file('sourcefile')
for line in f:
    if 'pattern' in line:
            # mind the , at the end,
            # since there's no stripping involved
            # and print adds a newline without it
            print line,

if you need to match regular expressions apart from the documentation in the Python Standard Library documentation for the re module also refer to the PyMotW Regular Expression page

answered Jun 21, 2011 at 22:00

serverhorror

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