Split PDF files in python - ValueError: invalid literal for int() with base 10: '' "

I am trying to split a huge pdf file into several small pdfs usinf pyPdf. I was trying with this oversimplified code:

from pyPdf import PdfFileWriter, PdfFileReader 
inputpdf = PdfFileReader(file("document.pdf", "rb"))

for i in xrange(inputpdf.numPages):
  output = P开发者_运维问答dfFileWriter()
  output.addPage(inputpdf.getPage(i))
  outputStream = file("document-page%s.pdf" % i, "wb")
  output.write(outputStream)
  outputStream.close()

but I got the follow error message:

Traceback (most recent call last):
File "./hltShortSummary.py", line 24, in <module>
  for i in xrange(inputpdf.numPages):
File "/usr/lib/pymodules/python2.7/pyPdf/pdf.py", line 342, in <lambda>
  numPages = property(lambda self: self.getNumPages(), None, None)
File "/usr/lib/pymodules/python2.7/pyPdf/pdf.py", line 334, in getNumPages
  self._flatten()
File "/usr/lib/pymodules/python2.7/pyPdf/pdf.py", line 500, in _flatten
  pages = catalog["/Pages"].getObject()
File "/usr/lib/pymodules/python2.7/pyPdf/generic.py", line 466, in __getitem__
  return dict.__getitem__(self, key).getObject()
File "/usr/lib/pymodules/python2.7/pyPdf/generic.py", line 165, in getObject
  return self.pdf.getObject(self).getObject()
File "/usr/lib/pymodules/python2.7/pyPdf/pdf.py", line 549, in getObject
  retval = readObject(self.stream, self)
File "/usr/lib/pymodules/python2.7/pyPdf/generic.py", line 67, in readObject
  return DictionaryObject.readFromStream(stream, pdf)
File "/usr/lib/pymodules/python2.7/pyPdf/generic.py", line 517, in readFromStream
  value = readObject(stream, pdf)
File "/usr/lib/pymodules/python2.7/pyPdf/generic.py", line 58, in readObject
  return ArrayObject.readFromStream(stream, pdf)
File "/usr/lib/pymodules/python2.7/pyPdf/generic.py", line 153, in readFromStream
  arr.append(readObject(stream, pdf))
File "/usr/lib/pymodules/python2.7/pyPdf/generic.py", line 87, in readObject
  return NumberObject.readFromStream(stream)
File "/usr/lib/pymodules/python2.7/pyPdf/generic.py", line 232, in readFromStream
  return NumberObject(name)
ValueError: invalid literal for int() with base 10: ''

any ideas???

I think this is a bug in pypdf. Check out the source here. NumberObject.readFromStream expects an integer-like string, and isn't getting one. Probably the pdf in question is malformed in some unexpected way.

Try it this way

for i in xrange(inputpdf.getNumPages()):