demerge_pdfs.py

"""
Python program to split large pdf(typically textbook) into small set of pdfs, maybe chapterwise
to enhance the experience of reading and feasibility to study only specific parts from the large original textbook
"""


import PyPDF2
path = input()
merged_pdf = open(path, mode='rb')


pdf = PyPDF2.PdfFileReader(merged_pdf)

(u, ctr, x) = tuple([0]*3)
for i in range(1, pdf.numPages+1):

    if u >= pdf.numPages:
        print("Successfully done!")
        exit(0)
    name = input("Enter the name of the pdf: ")
    ctr = int(input(f"Enter the number of pages for {name}: "))
    u += ctr
    if u > pdf.numPages:
        print('Limit exceeded! ')
        break

    base_path = '/Users/darpan/Desktop/{}.pdf'
    path = base_path.format(name)
    f = open(path, mode='wb')
    pdf_writer = PyPDF2.PdfFileWriter()

    for j in range(x, x+ctr):
        page = pdf.getPage(j)
        pdf_writer.addPage(page)

    x += ctr

    pdf_writer.write(f)
    f.close()


merged_pdf.close()
print("Successfully done!")