First steps with prompt toolkit (Python 3)

asyncio.py

import asyncio

from prompt_toolkit.shortcuts import prompt_async


@asyncio.coroutine
def my_coroutine():
    while True:
        result = yield from prompt_async('Say something: ', patch_stdout=True)
        print('You said: %s' % result)

loop = asyncio.get_event_loop()
loop.run_until_complete(my_coroutine())
loop.close()

completer.py

from prompt_toolkit import prompt
from prompt_toolkit.completion import Completer, Completion


class MyCustomCompleter(Completer):
    def get_completions(self, document, complete_event):
        yield Completion('completion', start_position=0)

text = prompt('> ', completer=MyCustomCompleter())

style.py

from prompt_toolkit.shortcuts import prompt
from pygments.style import Style
from prompt_toolkit.styles import Token


class MyStyle(Style):
    styles = {
        # User input.
        Token:          '#ff0066',

        # Prompt.
        Token.Username: '#884444',
        Token.At:       '#00aa00',
        Token.Colon:    '#00aa00',
        Token.Pound:    '#00aa00',
        Token.Host:     '#000088 bg:#aaaaff',
        Token.Path:     '#884444 underline',
    }


def get_prompt_tokens(cli):
    return [
        (Token.Username, 'john'),
        (Token.At,       '@'),
        (Token.Host,     'localhost'),
        (Token.Colon,    ':'),
        (Token.Path,     '/user/john'),
        (Token.Pound,    '# '),
    ]

text = prompt(get_prompt_tokens=get_prompt_tokens, style=MyStyle)