bytes-like object
In Python, a bytes-like object is any object that supports the buffer protocol and can expose its underlying binary data as a C-contiguous buffer. This protocol allows an object to share its binary data with other objects efficiently, without copying.
Bytes-like objects include bytes, bytearray, and memoryview objects, as well as array.array and other objects in Python’s standard library that expose binary data through the buffer protocol.
Bytes-like objects are useful when you’re working with binary data, such as reading from or writing to files in binary mode, handling network data, or processing images. They allow you to efficiently manipulate binary data without needing to convert it to other data types, which can be both time-consuming and memory-intensive.
Python also distinguishes between read-only bytes-like objects, such as bytes and a memoryview of a bytes object, and read-write (mutable) bytes-like objects, such as bytearray and a memoryview of a bytearray. Some APIs require mutable buffers, while others accept either kind, so check the docstring when you see an error message like “a bytes-like object is required.”
Example
Here’s an example that demonstrates how to use bytes-like objects in Python:
>>> # Example with bytes
>>> byte_data = b"Hello, Real Python!"
>>> byte_data
b'Hello, Real Python!'
>>> # Example with bytearray
>>> byte_array_data = bytearray(b"Hello, Real Python!")
>>> byte_array_data[7:11] = b"World"
>>> byte_array_data
bytearray(b'Hello, World Python!')
>>> # Example with memoryview
>>> byte_data = b"Hello, Real Python!"
>>> memory_view = memoryview(byte_data)
>>> memory_view[7:11].tobytes()
b'Real'
In this example, you see how bytes, bytearray, and memoryview objects can handle binary data in Python.
Related Resources
Tutorial
Bytes Objects: Handling Binary Data in Python
In this tutorial, you'll learn about Python's bytes objects, which help you process low-level binary data. You'll explore how to create and manipulate byte sequences in Python and how to convert between bytes and strings. Additionally, you'll practice this knowledge by coding a few fun examples.
For additional information on related topics, take a look at the following resources:
- Python's Bytearray: A Mutable Sequence of Bytes (Tutorial)
- Reading and Writing Files in Python (Guide) (Tutorial)
- Python Bytes (Quiz)
- Python's Bytearray (Quiz)
- Reading and Writing Files in Python (Course)
- Reading and Writing Files in Python (Quiz)
