parameters: (self, l)
docstring: Add listener to list of listeners. Not threadsafe. Must be
          called before processes started.
          @param l: listener
          @type  l: L{ProcessListener}
docstring_summary: Add listener to list of listeners. Not threadsafe. Must be
          called before processes started.
docstring_tokens: Add listener to list of listeners . Not threadsafe . Must be called before processes started .
function: def add_process_listener(self, l):
          """
          Add listener to list of listeners. Not threadsafe. Must be
          called before processes started.
          @param l: listener
          @type  l: L{ProcessListener}
          """
          self.listeners.add_process_listener(l)
function_tokens: def add_process_listener ( self , l ) : self . listeners . add_process_listener ( l )