threshold must be numeric and non-NAN, When printing numpy array, Why numpy.nan is undefined in python3

Question

Im trying to print all the values of a matrix in python2 by

import numpy as np
np.set_printoptions(threshold=np.nan)
print myMatrix

but its giving me the error threshold must be numeric and non-NAN

In python3 I can print the array by

import sys
numpy.set_printoptions(threshold=sys.maxsize)
print(myMatrix)

But why numpy.nan isn't working in python3

Answer 1

nunmpy.nan was never supposed to be supported . This is why it doesn't work in python 3

Answer 2

正确的是： np.set_printoptions(threshold=np.inf, linewidth=np.nan)