Create and activate your own virtualenv.
Run
pip install -r requirements.txt
Then you can use the program. Command for run the program
main.py pathToFirstPdf pathToSecondPdf pathToThirdPdf
If you create for example pdfs folder in root you can run
python main.py pdfs/first.pdf pdfs/second.pdf pdfs/third.pdf
In the future I want that program analyze pdfs folder and create merged.pdf file.