Slicing memory views in Python: Indexing syntax and example

Last update on April 23 2025 12:57:46 (UTC/GMT +8 hours)

9. Slice Memory View

Write a Python program that takes a slice of a memory view using indexing syntax and prints the slice.

Sample Solution:

Code:

def main():
    original_data = bytearray([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])

    memory_view = memoryview(original_data)

    # Taking a slice of the memory view
    start_index = 3
    end_index = 8
    sliced_memory_view = memory_view[start_index:end_index]

    print("Original Data:", original_data)
    print("Sliced Memory View:")
    print(bytearray(sliced_memory_view))
    print(sliced_memory_view.tolist())

if __name__ == "__main__":
    main()

Output:

Original Data: bytearray(b'\x01\x02\x03\x04\x05\x06\x07\x08\t\n')
Sliced Memory View:
bytearray(b'\x04\x05\x06\x07\x08')
[4, 5, 6, 7, 8]

In the exercise above, the "main()" function creates a bytearray and converts it to a memory view. Then, it uses indexing syntax to take a slice of the memory view, from index 3 (inclusive) to index 8 (exclusive). Using the tolist() method, the sliced memory view is converted to a list.

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to create a memory view on a bytes object, extract a slice using indexing syntax, and print the slice as a list of integers.
Write a Python function that takes a memory view and returns a slice from a specified start index to an end index, then displays the result in hexadecimal.
Write a Python script to generate a memory view from a bytearray and print a slice representing the middle section of the array.
Write a Python program to create a memory view, extract a slice using negative indices, and then convert the slice to a string using a given encoding.

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