indexing – Python, tuple indices must be integers, not tuple?
output variable is not a
N x 4 matrix, at least not in python types sense. It is a tuple, which can only be indexed by a single number, and you try to index by tuple (2 numbers with coma in between), which works only for numpy matrices. Print your output, figure out if the problem is just a type (then just convert to np.array) or if you are passing something completely different (then fix whatever is producing
Example of what is happening:
import numpy as np output = ((1,2,3,5), (1,2,1,1)) print output[1, 2] # your error print output[(1, 2)] # your error as well - these are equivalent calls print output # ok print np.array(output)[1, 2] # ok print np.array(output)[(1, 2)] # ok print np.array(output) # ok