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Groups > comp.lang.python > #103592

list index out of range Error , need to fix it or ignore it

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Iam on python 2.6 and Linux , I need  input on the below program ,
here is the spinet of my program


filename='/tmp2/2.txt'

def check_file():
    """
     Run the command parallel on all the machines , if there is a
file named /tmp/file2.txt  extract file2.txt

    """
    global filename
    baddr = ''
    cmd = ("run_al_paral 'ls -al %s'" % (filename))
    print(cmd)
    stdout, stderr, exitcode = run(cmd)
    print(stdout)
    lines = stdout.strip().split('\n')
    print(lines)
    for line in lines:
        if 'exited' in lines:
            continue

        file = lines[0].split()[9][6:]
        break
    print file
    return file

def main():
    functions = [check_file]
    for func in functions:
        try:
            func()
        except Exception as e:
            return False
if __name__ == '__main__':
      main()



1.If the file is present in any one of the machine the program works
fine , example if the file is in machine4 it works fine,


machine-4# touch /tmp2/2.txt
machine-4# python c_4.py
run_al_parall 'ls -al /tmp2/2.txt'
machine-4: -rw-r--r-- 1 root  wheel  0 Feb 27 08:15 /tmp2/2.txt
gpal-machine-2 exited with status 1
gpal-machine-5 exited with status 1
gpal-machine-3 exited with status 1
gpal-machine-1 exited with status 1

['machine-4: -rw-r--r-- 1 root  wheel  0 Feb 27 08:15 /tmp2/2.txt',
'gpal-machine-2 exited with status 1', 'gpal-machine-5 exited with
status 1', 'gpal-machine-3 exited with status 1', 'gpal-machine-1
exited with status 1']
2.txt


2. But if the file is not present we get index out of range error , do
we need to fix this or its expected ? or its ok.

machine-4# python c_4.py
isi_for_array 'ls -al /tmp2/2.txt'
machine-2 exited with status 1
machine-1 exited with status 1
machine-4 exited with status 1
machine-5 exited with status 1
machine-3 exited with status 1

['machine-2 exited with status 1', 'machine-1 exited with status 1',
'machine-4 exited with status 1', 'machine-5 exited with status 1',
'machine-3 exited with status 1']
ERROR:root:list index out of range

3. Any other tips to improve the program

Regards,
Ganesh

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list index out of range Error , need to fix it or ignore it Ganesh Pal <ganesh1pal@gmail.com> - 2016-02-27 22:20 +0530
  Re: list index out of range Error , need to fix it or ignore it Steven D'Aprano <steve@pearwood.info> - 2016-02-29 00:00 +1100

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