why numpy.ndarray is object is not callable in my simple for python loop

Question

I loaded a text file containing a two column matrix (e.g. below)

[ 1   3   2   4   3   5    2   0] 

My calculation is just to sum each row i.e. 1+3, 2+4, 3+5 and 2+0. I am using the below code:

data=np.loadtxt(fname="textfile.txt")## to load the above two column xy= data for XY in xy:    i=0      Z=XY(i,0)+XY(i,1)    i=i+1          print (Z) 

But I received an error saying numpy.ndarray object is not callable. Why does this happen? How can I do this simple calculation? Thanks.

Answer 1

The error TypeError: 'numpy.ndarray' object is not callable means that you tried to call a numpy array as a function.

Use

Z=XY[0]+XY[1] 

Instead of

Z=XY(i,0)+XY(i,1)