Panda3D ow to add an if statement to stop the camera spinning?

General Discussion
1

class WalkingPanda(ShowBase):
def init(self, no_rotate=False):
ShowBase.init(self)

    # Load the environment model.
    self.scene = self.loader.loadModel("models/environment")
    # Reparent the model to render.
    self.scene.reparentTo(self.render)
    # Apply scale and position transforms on the model.
    self.scene.setScale(0.25, 0.25, 0.25)
    self.scene.setPos(-8, 42, 0)

    # Add the spinCameraTask procedure to the task manager.
    self.taskMgr.add(self.spinCameraTask, "SpinCameraTask")

    # Load and transform the panda actor.
    self.pandaActor = Actor("models/panda-model",
                            {"walk": "models/panda-walk4"})
    self.pandaActor.setScale(0.005, 0.005, 0.005)
    self.pandaActor.reparentTo(self.render)
    # Loop its animation.
    self.pandaActor.loop("walk")

# Define a procedure to move the camera.
def spinCameraTask(self, task):

angleDegrees = task.time * 6.0
angleRadians = angleDegrees * (pi / 180.0)
self.camera.setPos(20 * sin(angleRadians), -20.0 * cos(angleRadians), 3)
self.camera.setHpr(angleDegrees, 0, 0)
return Task.cont

2

Well, under what condition do you want the camera to stop spinning?