Cómo dar autocompletar en Python

import readline
readline.parse_and_bind("tab: complete")

def complete(text,state):
    volcab = ['dog','cat','rabbit','bird','slug','snail']
    results = [x for x in volcab if x.startswith(text)] + [None]
    return results[state]

readline.set_completer(complete)

line = input('prompt> ')
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