Creating NumPy memory views: 1D and 3D array examples in Python

Last update on April 01 2025 13:18:52 (UTC/GMT +8 hours)

3. 1D and 3D Memory View from NumPy Array

Write a Python program that creates a 1-dimensional and 3-dimensional memory view from a NumPy array.

Sample Solution:

Code:

import numpy as np

def main():
    try:
        # Create a NumPy array
        array_1_d = np.array([1, 2, 3, 4, 5, 6])
        array_3_d = np.array([[[1, 2, 3], [4, 5, 6]], [[7, 8, 9], [10, 11, 12]]])
        
        # Create memory views from the NumPy arrays
        print("Memory views:")
        mem_view_1_d = memoryview(array_1_d)
        print(mem_view_1_d)
        mem_view_3_d = memoryview(array_3_d)
        print(mem_view_3_d)
        
        # Print the memory views
        print("\n1-D Memory View:")
        print(mem_view_1_d.tolist())
        
        print("\n3-D Memory View:")
        print(mem_view_3_d.tolist())
    except Exception as e:
        print("An error occurred:", e)

if __name__ == "__main__":
    main()

Output:

Memory views:
<memory at 0x00000266DBB4E108>
<memory at 0x00000266DBB085E8>

1-D Memory View:
[1, 2, 3, 4, 5, 6]

3-D Memory View:
[[[1, 2, 3], [4, 5, 6]], [[7, 8, 9], [10, 11, 12]]]

The above exercise demonstrates how to create memory views from NumPy arrays and print their contents.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to create a 1-dimensional memory view from a NumPy array and print its shape and first few elements.
• Write a Python script to generate a 3-dimensional NumPy array, create a memory view, and then display the dimensions and a slice from the array.
• Write a Python function to convert a NumPy array into both a 1D and a 3D memory view, printing the type and shape of each view.
• Write a Python program to create a NumPy array, form a memory view of it in different dimensions, and verify that changes in the array are reflected in the memory view.

Python Code Editor :

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