# Write a Python program to numpy.nanmean() function # Python code to demonstrate the# use of numpy.nanmeanimport 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))