parameters: (listener)
return_statement: return _connections[""].addStepListener(listener)
docstring: addStepListener(traci.StepListener) -> int
  
      Append the step listener (its step function is called at the end of every call to traci.simulationStep())
      to the current connection.
      Returns the ID assigned to the listener if it was added successfully, None otherwise.
docstring_summary: addStepListener(traci.StepListener) -> int
docstring_tokens: addStepListener ( traci . StepListener ) - > int
function: def addStepListener(listener):
      """addStepListener(traci.StepListener) -> int
  
      Append the step listener (its step function is called at the end of every call to traci.simulationStep())
      to the current connection.
      Returns the ID assigned to the listener if it was added successfully, None otherwise.
      """
      if "" not in _connections:
          raise FatalTraCIError("Not connected.")
      return _connections[""].addStepListener(listener)
function_tokens: def addStepListener ( listener ) : if "" not in _connections : raise FatalTraCIError ( "Not connected." ) return _connections [ "" ] . addStepListener ( listener )