code: def loadfile(self, fobj, format):
          
          if format == "hex":
              self.loadhex(fobj)
          elif format == "bin":
              self.loadbin(fobj)
          else:
              raise ValueError('format should be either "hex" or "bin";'
                  ' got %r instead' % format)
docs: Load data file into internal buffer. Preferred wrapper over
          loadbin or loadhex.
  
          @param  fobj        file name or file-like object
          @param  format      file format ("hex" or "bin")