code: def load_trace(path, *args, **kwargs):
      
      with open(path, 'rb') as f:
          magic = f.read(MAGIC_LEN)
      if magic not in FILE_TYPE_HANDLER:
          raise Exception('Unknown file magic: %s' % (binascii.hexlify(magic)))
  
      return FILE_TYPE_HANDLER[magic](path, *args, **kwargs)
docs: Read a packet trace file, return a :class:`wltrace.common.WlTrace` object.
  
      This function first reads the file's magic
      (first ``FILE_TYPE_HANDLER`` bytes), and automatically determine the
      file type, and call appropriate handler to process the file.
  
      Args:
          path (str): the file's path to be loaded.
  
      Returns:
          ``WlTrace`` object.