pyPdf.utils.PdfReadError: multiple definitions in dictionary

[willfill]

i have some code :

import pyPdf

def getPDFContent():
content = ""
# Load PDF into pyPDF
pdf = pyPdf.PdfFileReader(file(pathToPdf, 'rb'))
# Iterate pages
print pdf.documentInfo
for i in range(0, pdf.getNumPages()):
# Extract text from page and add to content
content += pdf.getPage(i).extractText() + " \n"
# Collapse whitespace
content = u" ".join(content.replace(u"\xa0", u" ").strip().split())
return content
f = open(pathToTxt,'w+')
f.write(getPDFContent())
f.close()

where pathToPdf and pathToTxt it is absolute path to the files.
but i got error :
Traceback (most recent call last):
File "C:/Users/will/Desktop/coding/mytest.py", line 21, in
print pdf.getPage(14)
File "C:\Python\lib\site-packages\pyPdf\pdf.py", line 450, in getPage
self._flatten()
File "C:\Python\lib\site-packages\pyPdf\pdf.py", line 607, in _flatten
self._flatten(page.getObject(), inherit, **addt)
File "C:\Python\lib\site-packages\pyPdf\generic.py", line 165, in getObject
return self.pdf.getObject(self).getObject()
File "C:\Python\lib\site-packages\pyPdf\pdf.py", line 649, in getObject
retval = readObject(self.stream, self)
File "C:\Python\lib\site-packages\pyPdf\generic.py", line 67, in readObject
return DictionaryObject.readFromStream(stream, pdf)
File "C:\Python\lib\site-packages\pyPdf\generic.py", line 531, in readFromStream
value = readObject(stream, pdf)
File "C:\Python\lib\site-packages\pyPdf\generic.py", line 67, in readObject
return DictionaryObject.readFromStream(stream, pdf)
File "C:\Python\lib\site-packages\pyPdf\generic.py", line 531, in readFromStream
value = readObject(stream, pdf)
File "C:\Python\lib\site-packages\pyPdf\generic.py", line 67, in readObject
return DictionaryObject.readFromStream(stream, pdf)
File "C:\Python\lib\site-packages\pyPdf\generic.py", line 534, in readFromStream
raise utils.PdfReadError, "multiple definitions in dictionary"
pyPdf.utils.PdfReadError: multiple definitions in dictionary

[sblzk]

https://bugs.launchpad.net/pypdf/+bug/242755

[mlavin]

It isn't clear from the PDF spec whether duplicate keys should be allowed: http://pdf.editme.com/pdfua-docinfodictionary http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/pdf_reference_1-7.pdf (Section 10.2.1). The terminology (dictionary, key/value) seems to imply unique keys. It is clear that some programs are creating documents with duplicate keys making them unreadable by PyPDF due to this issue.