code: def set_plugin_directories(self, paths, except_blacklisted=True):
          
          self.directory_manager.set_directories(paths, except_blacklisted)
docs: Sets the plugin directories to `directories`. This will delete
          the previous state stored in `self.plugin_directories` in favor
          of the `directories` passed in.
  
          `directories` may be either a single object or an iterable.
  
          `directories` can contain relative paths but will be
          converted into absolute paths based on the current working
          directory.
  
          if `except_blacklisted` is `True` all `directories` in
          blacklisted that are blacklisted will be removed