PyPDF2 split pdf by pages

You can use the write method of the PdfFileWriter to write out to the file.

from PyPDF2 import PdfFileReader, PdfFileWriter

with open("input.pdf", 'rb') as infile:

    reader = PdfFileReader(infile)
    writer = PdfFileWriter()
    writer.addPage(reader.getPage(0))

    with open('output.pdf', 'wb') as outfile:
        writer.write(outfile)

You may want to loop over the pages of the input file, create a new writer object, add a single page. Then write out to an ever incrementing filename or have some other scheme for deciding output filename?