pdfminer3k has no method named create_pages in PDFPage
Perhaps,you could use pdfminer.six.
It's description:

fork of PDFMiner using six for Python 2+3 compatibility

After installing it using pip：

pip install pdfminer.six

The usage of it is just like pdfminer, at least in my code.
Hope this could save your day :)
Since I want to move from python 2 to 3, I tried to work with pdfmine.3kr in python 3.4. It seems like they have edited everything. Their change logs do not reflect the changes they have done but I had no success in parsing pdf with pdfminer3k. For example:
They have moved PDFDocument into pdfparser (sorry, if I spell incorrectly). PDFPage used to have create_pages method which is gone now. All I can see inside PDFPage are internal methods. Does anybody has a working example of pdfminer3k? It seems like there is no new documentation to reflect any of the changes.