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Asked: 2026-05-25T13:05:42+00:00

How can I represent a byte array (like in Java with byte[]) in Python?

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How can I represent a byte array (like in Java with byte[]) in Python? I’ll need to send it over the wire with gevent.

byte key[] = {0x13, 0x00, 0x00, 0x00, 0x08, 0x00};
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  1. Editorial Team

    In Python 3, we use the bytes object, also known as str in Python 2.

    # Python 3
key = bytes([0x13, 0x00, 0x00, 0x00, 0x08, 0x00])

# Python 2
key = ''.join(chr(x) for x in [0x13, 0x00, 0x00, 0x00, 0x08, 0x00])

    I find it more convenient to use the base64 module…

    # Python 3
key = base64.b16decode(b'130000000800')

# Python 2
key = base64.b16decode('130000000800')

    You can also use literals…

    # Python 3
key = b'\x13\0\0\0\x08\0'

# Python 2
key = '\x13\0\0\0\x08\0'
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