Python script to Batch file

Question

I have a batch file that runs a python script. I am running Python 3.2. I want to send a variable like an integer or string from the python script back to the batch file, is

Answer 1

You can try this batch script for this issue, as an example:

@echo off

REM     %1 - This is the parameter we pass with the desired return code for the Python script that will be captured by the ErrorLevel env. variable.  
REM     A value of 0 is the default exit code, meaning it has all gone well. A value greater than 0 implies an error
REM     and this value can be captured and used for any error control logic and handling within the script
   
set ERRORLEVEL=
set RETURN_CODE=%1

echo (Before Python script run) ERRORLEVEL VALUE IS: [ %ERRORLEVEL% ]
echo.

call python -c "import sys; exit_code = %RETURN_CODE%; print('(Inside python script now) Setting up exit code to ' + str(exit_code)); sys.exit(exit_code)"

echo.
echo (After Python script run) ERRORLEVEL VALUE IS: [ %ERRORLEVEL% ]
echo.

And when you run it a couple of times with different return code values you can see the expected behaviour:

PS C:\Scripts\ScriptTests> & '\TestPythonReturnCodes.cmd' 5

(Before Python script run) ERRORLEVEL VALUE IS: [ 0 ]

(Inside python script now) Setting up exit code to 5

(After Python script run) ERRORLEVEL VALUE IS: [ 5 ]

PS C:\Scripts\ScriptTests> & '\TestPythonReturnCodes.cmd' 3

(Before Python script run) ERRORLEVEL VALUE IS: [ 0 ]

(Inside python script now) Setting up exit code to 3

(After Python script run) ERRORLEVEL VALUE IS: [ 3 ]

PS C:\Scripts\ScriptTests