Problem with subclass of Actor

I can try this:

from math import pi, sin, cos
from Modelos import Panda
from direct.showbase.ShowBase import ShowBase
from direct.task import Task
from import Actor
class Aplicacion(ShowBase):
    def __init__(self):
        #Carga el entorno el mapa o escenario.
        self.scene = self.loader.loadModel("environment")
        #Rerendiza el modelo de la zona carga de objetos modelo.
        #Elige la escala del entorno y la posicion.
        self.scene.setPos(-8, 42, 0)
        panda = Panda()

        #añade el proceso spinCameraTask al administrador de tareas de panda
        self.taskMgr.add(self.spinCameraTask, "SpinCameraTask")
    #Define el proceso de movimiento de la camara
    def spinCameraTask(self, task):
        angleDegrees = task.time * 6.0
        angleRadians = angleDegrees * (pi / 180.0) * sin(angleRadians), -30.0 * cos(angleRadians), 3), -5, 0)
        return Task.cont
app = Aplicacion()


from import Actor
from direct.showbase.ShowBase import ShowBase
class Panda(Actor):
    def __init__(self):

        self.modelo = Actor ("panda-model",
                        {"walk": "panda-walk4"})
        self.setScale(0.005, 0.005, 0.005)

and i dont have problem but i dont see anything if im try call Panda() i have this problem

Traceback (most recent call last):
  File "C:\Users\Borja\Desktop\Panda3d\Ejemplos\", line 33, in <module>
    app = Aplicacion()
  File "C:\Users\Borja\Desktop\Panda3d\Ejemplos\", line 21, in __init__
    panda ()
TypeError: 'Panda' object is not callable

The error message doesn’t seem to match your code. According to the error, on line 21 of the file, you have “panda ()”. This would be incorrect code. Could you make sure you the code you are posting and the code you are running match up?