Unable to identify Tuple index error

[appmkl]

data_shape points to the following tuple (index of each value shown below them)

Output:
 (3343, 128, 128) # 0 1 2 

data_shape[3] gives an index error because the index only goes up to 2

Thank you for the answer ! Yes I figured that was the problem after looking online. So should I just change the data_value to 2 instead of 3 ?

I'm just confused as I followed the. step by step guide on github and only changed the image source, so not sure why the index onnly goes up to 2 ? Could you explain perhaps ?

Thank you for your time !!