Merge only the first page of many pdfs files with Python

This is a script to merge just the first page of different pdf with PyPDF2.

import os
from PyPDF2 import PdfFileMerger

# list of pdf
x = [a for a in os.listdir() if a.endswith(".pdf")]

# merger object
merger = PdfFileMerger()

# add all file in the list to the merger object
for pdf in x:
    merger.append(open(pdf, 'rb'), pages=(0,1))

# writes the merger object in the new file
with open("result.pdf", "wb") as fout:
    merger.write(fout)