code: def scrape_all_files(self):
          
          try:
              for dcmf in self.items:
                  yield self.read_dcm(dcmf)
          except IOError as ioe:
              raise IOError('Error reading DICOM file: {}.'.format(dcmf)) from ioe
docs: Generator that yields one by one the return value for self.read_dcm
          for each file within this set