mergePdf.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from pyPdf import PdfFileReader, PdfFileWriter

out = PdfFileWriter()

for i in range(1, 165):
            src_pdf = u"/path/to/pdfs/" + str(i) + u".pdf"
            pdf = PdfFileReader(file(src_pdf, 'rb'))

            for page in pdf.pages:
                out.addPage(page)

ous = file(u"/path/to/dst/file.pdf", 'wb')
out.write(ous)
ous.close()