**Bytes object is immutable sequence of single bytes. Mutable version is called bytearray.**

<int> = <bytes>[<index>]

<bytes> = <bytes>[<slice>]

<bytes> = b''.join(<coll_of_bytes>)

<bytes> = <str>.encode(encoding='utf-8')

<bytes> = <int>.to_bytes(length, byteorder='big|little', signed=False)

<bytes> = bytes.fromhex(<hex>)