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Python · Class

bytearray

bytearray() creates a mutable sequence of bytes. You can build it from text, a size, a buffer, or an iterable of byte values.

Last updated 2 November 2026

Syntax

bytearray(source=b'')
bytearray(source, encoding, errors='strict')

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bytes
memoryview
str.encode()
Mutable Sequence Types

Source: Built-in functions — Python 3.16.0a1 documentation. Checked 2026-11-03.