I have a python code in which I am trying to read the contents of various pdf files-scanned and text based both using pdfminer , the code is like this:

``with open(os.path.join(pdf_directory, file_name), 'rb') as file: 
                
                output_string = StringIO()

                parser = PDFParser(file)
                doc = PDFDocument(parser)
                rsrcmgr = PDFResourceManager()
                device = TextConverter(rsrcmgr, output_string, laparams=LAParams())
                interpreter = PDFPageInterpreter(rsrcmgr, device)
                for page in PDFPage.create_pages(doc):
                    interpreter.process_page(page)
                text=output_string.getvalue()
                if len(text)==0:
                    
                    #if a mixture of pages are there then we do need to modify this approach
                    extract_ocr(pdf_directory,file_name,text_directory)``

Where extract_ocr is a different function where ocr-processing for scanned pdf is done, the code is failing as the text extracted from it is indeed empty but the len(text)==0 condition is not satisfied as len(text)!=0 , this condition was working earlier when i was using pypdf2 instead of pdfminer, any suggestions how to tackle this condition?