python, pypdf2, combine files, keeps adding files code example

Example: python merge pdfs

from PyPDF2 import PdfFileMerger, PdfFileReader
merger = PdfFileMerger()

merger.append(PdfFileReader(open(filename1, 'rb')))
merger.append(PdfFileReader(open(filename2, 'rb')))

merger.write("merged.pdf")