Python | Numpy MaskedArray.ior()

Namachila October 13, 2025

0 1 1 minute read

numpy.ma.MaskedArray class is a subclass of ndarray designed to manipulate numerical arrays with missing data. With the help of Numpy MaskedArray.__ior__we can get the elements that is OR by the value that is provided as a parameter in the MaskedArray.__ior__() method.

Syntax: numpy.MaskedArray.__ior__($self, value, /)

Return: Return self|=value.

Example #1 :
In this example we can see that every element is OR by the value that is passed as a parameter in MaskedArray.__ior__() method.

# import the important module in python  
import numpy as np  
      
# make an array with numpy  
gfg = np.ma.array([1, 2, 3, 4, 5])  
      
# applying MaskedArray.__ior__() method  
print(gfg.__ior__(2))  
  

Output:

[3 2 3 6 7]

Example #2:

# import the important module in python  
import numpy as np  
      
# make an array with numpy  
gfg = np.ma.array([[1, 2, 3, 4, 5],  
                [6, 5, 4, 3, 2]])  
      
# applying MaskedArray.__ior__() method  
print(gfg.__ior__(1))  