merget12.py

from PyPDF2 import PdfFileReader, PdfFileWriter

def merge_pdfs(filenames):
    pdf_writer = PdfFileWriter()

    for path in filenames:
        pdf_reader = PdfFileReader(path)
        for page in range(pdf_reader.getNumPages()):
            # Add each page to the writer object
            pdf_writer.addPage(pdf_reader.getPage(page))

    # Write out the merged PDF
    with open("merge.pdf", 'wb') as out:
        pdf_writer.write(out)


filenames = ['doc1.pdf', 'doct2.pdf']
merge_pdfs(filenames)