text: import os
  from pdfminer.pdfparser import PDFParser,PDFDocument
  
  def extract():
      #read pdf files into list
      file_list = os.listdir("pdf")
      if '.DS_Store' in file_list:
          file_list.remove('.DS_Store')
  
      metadata = []
      for file in file_list:
          fp = open('pdf/' + file, 'rb')
          print(file)
          parser = PDFParser(fp)
          doc = PDFDocument()
          parser.set_document(doc)
          doc.set_parser(parser)
          doc.initialize()
          metadata.extend(doc.info)
  
      return metadata
  