def connect(self): 
        try:
            self.connection = pymongo.Connection(self.host, self.port)
            self.db = self.connection[self.name]
        except AutoReconnect:
            raise DatabaseException("It's not possible connect to the database")
def loopcv():
  import cv
  while 1:
    cv.ShowImage('hi',get_depth().astype(np.uint8))
    cv.WaitKey(10)