CODE EXAMPLE FOR PYTHON

or without file pythonmodules.txt

@echo off
set "input=C:Program FilesQGIS 3.4"
echo %input%

@echo ON

cd /d %~dp0

call py3-env.bat "%input%"

python3 -m pip install --upgrade pip
python3 -m pip install pandas
python3 -m pip install geopandas
python3 -m pip install pysal