Passing multiple inputs to .bat file via Python script

Question

I'm having a problem passing some arguments through my python script to a test.bat file.

//test.bat
@echo off
:: Extracting and input arguments
set IP=%1
set PASS=%~2
set DIR=%~3

:: Setup logfile
set LOG_FILE="%cd%\testLog.log"
if exist %LOG_FILE% del %LOG_FILE%

echo -------------------------------------------------------- >> %LOG_FILE%
echo Date    :  %date% >> %LOG_FILE%
echo Time    :  %time% >> %LOG_FILE%
echo IP      :  %IP% >> %LOG_FILE%
echo PW      :  %PASS% >> %LOG_FILE%
echo PATH    :  %DIR% >> %LOG_FILE%
.....

test.py

p = subprocess.Popen('test.bat', stdin = subprocess.PIPE)
ipAdr = '127.0.0.1'
pasWD = 'root'
locPath = 'C:\repos\batTester'

p.stdin.write(bytes(ipAdr , 'ascii')) #IP
p.stdin.write(bytes(pasWD , 'ascii')) #password
p.stdin.write(bytes(locPath , 'ascii'))#directory

I see, that bath file is run correctly, because testLog.log file is created, but IP, PW, and DIR fields are empty, so the rest of the script can't be executed. How should I pass multiple arguments to a .bat file using a python script?

BTW, you can change that entire batch file to this, which is more efficient. 1. @(Echo --------------------------------------------------------, 2. Echo Date : %DATE%, 3. Echo Time : %TIME, 4. Echo IP : %~1, 5. Echo PW : %~2, 6. Echo PATH : %~3) 1> "testLog.log". There is no need to define environment variables for the input arguments, (as those are already saved to argument variables), or to open a file, write to it, and then close it, for every single echo command. — Compo
– Compo, Commented Oct 24, 2021 at 13:28

Corralien · Accepted Answer · 2021-10-24 12:44:54Z

1

Try to run subprocess.run:

p = subprocess.run(['test.bat', ipAdr, pasWD, locPath])

answered Oct 24, 2021 at 12:44

Corralien

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2 Comments

MrmDdda Over a year ago

Thanks ;) I have one more question. The file test.bat connects to a specified IP address, but if the host is unreachable the whole application freezes for quite a long time. Is there any easy way to avoid this? The only thing I can think of is running the 'subprocess' as a separate thread.

Corralien Over a year ago

You have a timeout parameter.

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