@echo off
setlocal
cd /d "%~dp0"

if exist "D:\Anaconda3\python.exe" (
    "D:\Anaconda3\python.exe" -B main.py
    goto :done
)

where py >nul 2>nul
if not errorlevel 1 (
    py -3 -B main.py
    goto :done
)

where python >nul 2>nul
if not errorlevel 1 (
    python -B main.py
    goto :done
)

echo Python 3 was not found.
echo Install Python 3 and enable "Add Python to PATH", then try again.
pause

:done
endlocal