getting raw data only

[mareymm]

I'm getting only raw data while calling back attention data, does anyone know how to solve it?
this my code :
from NeuroPy.NeuroPy import NeuroPy
from time import sleep
abc = NeuroPy("COM3", 16550)
def attention_callback(attention_value):
"""this function will be called everytime NeuroPy has a new value for attention"""
print ("Value of attention is: ", attention_value)
return None

abc.setCallBack("attention", attention_callback)
abc.start()

I get:

self.rawValue = 1917
self.rawValue = 779
self.rawValue = -1625
self.rawValue = -744
self.rawValue = 1589
self.rawValue = 1028
self.rawValue = -1491
self.rawValue = -1111
Mindwave has already started!
self.rawValue = 1335
self.rawValue = 1809
self.rawValue = -426