code: def _JoinKeyPath(self, path_segments):
      
      # This is an optimized way to combine the path segments into a single path
      # and combine multiple successive path separators to one.
  
      # Split all the path segments based on the path (segment) separator.
      path_segments = [
          segment.split(definitions.KEY_PATH_SEPARATOR)
          for segment in path_segments]
  
      # Flatten the sublists into one list.
      path_segments = [
          element for sublist in path_segments for element in sublist]
  
      # Remove empty path segments.
      path_segments = filter(None, path_segments)
  
      return definitions.KEY_PATH_SEPARATOR.join(path_segments)
docs: Joins the path segments into key path.
  
      Args:
        path_segments (list[str]): Windows Registry key path segments.
  
      Returns:
        str: key path.