# Write a Python program to numpy.nanmean() function 
# Python code to demonstrate the
# use of numpy.nanmean
import numpy as np
   
# create 2d array with nan value.
arr = np.array([[20, 15, 37], [47, 13, np.nan]])
   
print("Shape of array is", arr.shape)
   
print("Mean of array without using nanmean function:",
                                           np.mean(arr))
   
print("Using nanmean function:", np.nanmean(arr))