无法从python脚本执行命令行参数

Question

I am trying to run a command line argument through python script. Script triggers the .exe but it throws an error as System.IO.IOException: The handle is invalid. . Following is my code :

import os , sys , os.path
from subprocess import call
import subprocess, shlex
def execute(cmd):
    """
        Purpose  : To execute a command and return exit status
    """
    process = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    (result, error) = process.communicate()

    rc = process.wait()

    if rc != 0:
        print "Error: failed to execute command:",cmd
        print error
    return result

found_alf = r"C:\AniteSAS\ResultData\20170515\Run01\1733200515.alf"
filter_alvf = r"C:\Users\sshaique\Desktop\ALF\AniteLogFilter.alvf"

command = str(r'ALVConsole.exe -e -t -i ' + '\"'+found_alf+'\"' + ' --ffile ' + '\"'+filter_alvf+'\"')
print command
os.chdir('C:\Program Files\Anite\LogViewer\ALV2')
print os.getcwd()
print "This process detail: \n", execute(command)

Output is as follows :

ALVConsole.exe -e -t -i "C:\\AniteSAS\\ResultData\\20170515\\Run01\\1733200515.alf" --ffile "C:\\Users\\sshaique\\Desktop\\ALF\\AniteLogFilter.alvf" C:\\Program Files\\Anite\\LogViewer\\ALV2

This process detail: Error: failed to execute command: ALVConsole.exe -e -t -i "C:\\AniteSAS\\ResultData\\20170515\\Run01\\1733200515.alf" --ffile "C:\\Users\\sshaique\\Desktop\\ALF\\AniteLogFilter.alvf"

Unhandled Exception: System.IO.IOException: The handle is invalid.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

at System.Console.GetBufferInfo(Boolean throwOnNoConsole, Boolean& succeeded)

at ALV.Console.CommandLineParametersHandler.ConsoleWriteLine(String message, Boolean isError)

at ALV.Console.CommandLineParametersHandler.InvokeActions()

at ALV.Console.Program.Main(String[] args)

When I copy the command line argument from the above output and run manually from cmd it works fine. ALVConsole.exe -e -t -i "C:\\AniteSAS\\ResultData\\20170515\\Run01\\1733200515.alf" --ffile "C:\\Users\\sshaique\\Desktop\\ALF\\AniteLogFilter.alvf"

I am using Windows 7 and Python 2.7.13 for. Please suggest overcoming this issue.

EDIT: I have also tried to pass command as a list s as per below code but the issue remains the same.

command = str(r'ALVConsole.exe -e --csv -i ' + '\"'+found_alf+'\"' + ' --ffile ' + '\"'+filter_alvf+'\"')
s=shlex.split(command)
print s
print "This process detail: \n", execute(s)

Answer 1

Based on your error messages I think that this problem is with ALVConsole.exe, not your Python script.

When you redirect the output, ALVConsole.exe tries to do something to the console (like setting cursor position, or getting the size of the terminal) but fails like this.

Is there a flag to ALVConsole.exe that modifies the output to a machine-readable version? I wasn't able to find the documentation for this program.