# How to make a NumPy array read-only in Python 
 import numpy as np
  
  
a = np.zeros(11)
print("Before any change ")
print(a)
  
a[1] = 2
print("Before after first change ")
print(a)
  
a.flags.writeable = False
print("After making array immutable on attempting  second change ")
a[1] = 7