rsrcmgr = PDFResourceManager()
laparams = LAParams()
device = PDFPageAggregator(rsrcmgr, laparams=laparams)
interpreter = PDFPageInterpreter(rsrcmgr, device)
for page in doc.get_pages():
    interpreter.process_page(page)
layout = device.get_result()
for lt_obj in layout:
    if isinstance(lt_obj, LTTextBox) or isinstance(lt_obj, LTTextLine):
        pass
pdfminer3k не имеет метода с именем create_pages в PDFPage