Batch file to setup a python virtual environment

demos/python/create_env.bat

@@ -0,0 +1,87 @@
+@ECHO OFF
+REM
+REM  Java Information Dynamics Toolkit (JIDT)
+REM  Copyright (C) 2022, Joseph T. Lizier
+REM  
+REM  This program is free software: you can redistribute it and/or modify
+REM  it under the terms of the GNU General Public License as published by
+REM  the Free Software Foundation, either version 3 of the License, or
+REM  (at your option) any later version.
+REM  
+REM  This program is distributed in the hope that it will be useful,
+REM  but WITHOUT ANY WARRANTY; without even the implied warranty of
+REM  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+REM  GNU General Public License for more details.
+REM  
+REM  You should have received a copy of the GNU General Public License
+REM  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+REM
+
+REM Create a python environment (stored in folder %folder%) with jpype1, numpy and scipy installed
+
+REM Name of folder to use and python commands -- change if required:
+set folder=jpype_env
+set pythonCmd=python
+set pipCmd=pip
+
+REM First make sure that the virtualenv package is installed.
+%pipCmd% show virtualenv >nul 2>&1
+if %errorlevel% == 0 (
+    echo virtualenv already installed, proceeding
+) else (
+    echo installing virtualenv with %pipCmd% ...
+    %pythonCmd% -m pip install --user virtualenv
+    REM %errorlevel% doesnt seem to return as expect from the above, so checking success via pip: 
+    %pipCmd% show virtualenv >nul 2>&1
+    if %errorlevel% neq 0 (
+        echo pip install of virtualenv failed
+        exit /b 1
+    ) else (
+        echo pip install of virtualenv succeeded
+    )
+)
+
+REM Create a python environment (stored in folder %folder%)
+%pythonCmd% -m venv %folder%
+if %errorlevel% neq 0 (
+    REM Virtual environment creation did not work:
+    echo Virtual environment creation did not work. Do you need to pip install virtualenv? >&2
+    exit /b 2
+) else (
+    echo Virtual environment created in %folder%
+)
+
+REM enter the environment
+call %folder%\Scripts\activate.bat
+if %errorlevel% neq 0 (
+    echo Virtual environment unable to be activated
+    exit /b 3
+) else (
+    echo Python environment started and activated.
+    echo Beginning pip installations for the environment
+)
+
+REM install jpype1 and numpy (does not matter if they are already installed)
+%pipCmd% install jpype1
+%pipCmd% install numpy
+
+echo.
+echo jpype1 and numpy installed - you have a functional installation.
+echo.
+echo Now trying scipy, matplotlib and jupyter, but they are optional...
+echo.
+
+%pipCmd% install scipy
+%pipCmd% install matplotlib
+%pipCmd% install jupyter
+
+echo.
+echo scipy, matplotlib and jupyter installed
+echo.
+
+echo.
+echo In Powershell activate the environment via calling: %folder%\Scripts\Activate.ps1
+echo Otherwise activate the environment via calling: %folder%\Scripts\activate.bat
+
+deactivate
+