Extract specific pages of PDF and save it with Python

Question

I have some sources and tried to code which extract some pages and create pdf files. I have a list which looks like this

information = [(filename1,startpage1,endpage1), (filename2, startpage2, endpage2), ...,(filename19,startpage19,endpage19)].

This is my code.

from PyPDF2 import PdfFileReader, PdfFileWriter

reader = PdfFileReader("example.pdf")

for page in range(reader.getNumPages() - 1):
    writer = PdfFileWriter()
    start = information[page][1]
    end = information[page][2]
    while start < end:
        writer.addPage(reader.getPage(start))
        start += 1
        output_filename = "{}_{}_page_{}.pdf".format(
            information[page][0], information[page][1], information[page][2]
        )
    with open(output_filename, "wb") as out:
        writer.write(out)

But the output is weird.. some has nothing inside and some has just one page in it. How can I correct this?

Answer 1

I have fixed the issue. it was the equal sign (start<=end).

for page in range(len(information)):
    pdf_writer = PyPDF2.PdfFileWriter()
    start = information[page][1]
    end = information[page][2]
    while start<=end:
        pdf_writer.addPage(pdfReader.getPage(start-1))
        start+=1
    if not os.path.exists(savepath):
        os.makedirs(savepath)
    output_filename = '{}_{}_page_{}.pdf'.format(information[page][0],information[page][1], information[page][2])
    with open(output_filename,'wb') as out:
        pdf_writer.write(out)