bookscript

from math import *
import sys
from pyPdf import PdfFileWriter, PdfFileReader


blank = "blank.pdf"
inpdf = PdfFileReader(file( sys.argv[1], "rb"))
outpdf = PdfFileWriter()

n = 6
numberOfPages = inpdf.getNumPages();

katherne  = n*4
numberOfKathernes = int(ceil(float(numberOfPages)/katherne))

pages = range(0,numberOfKathernes*katherne)

output_pdf = PdfFileWriter()

for j in range(0,numberOfKathernes):

    A = n*4
    B = 1
    index = 1
    for i in range(0,katherne):
        if index%4 < 2:
            pages[j*n*4+i] = j*n*4 + A
            A = A - 1
        else:
            pages[j*n*4+i] = j*n*4 + B
            B = B + 1
        index = index + 1



number = 1
uToShift = 0
for page in pages:

    if(page >= numberOfPages):
        outpdf.addBlankPage()
    else:
        p = inpdf.getPage(page-1)

        if number%2 == 1:
            uToShift = -50
        else:
            uToShift = 50

        for box in (p.mediaBox, p.cropBox, p.bleedBox, p.trimBox, p.artBox):
            box.lowerLeft = (box.getLowerLeft_x() - uToShift, box.getLowerLeft_y())
            box.upperRight = (box.getUpperRight_x() - uToShift, box.getUpperRight_y())
        outpdf.addPage(p)
    number = number + 1


#outputStream = file(sys.argv[2], "wb")
outputStream = file("output.pdf","wb")
outpdf.write(outputStream)
outputStream.close()