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#!/usr/bin/env python
'''
usage: extract.py <some.pdf>
Locates Form XObjects and Image XObjects within the PDF,
and creates a new PDF containing these -- one per page.
Resulting file will be named extract.<some.pdf>
'''
import sys
import os
from pdfrw import PdfReader, PdfWriter
from pdfrw.findobjs import page_per_xobj
inpfn, = sys.argv[1:]
outfn = 'extract.' + os.path.basename(inpfn)
pages = list(page_per_xobj(PdfReader(inpfn).pages, margin=0.5*72))
if not pages:
raise IndexError("No XObjects found")
writer = PdfWriter()
writer.addpages(pages)
writer.write(outfn)
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