Based on http://code.activestate.com/recipes/578552-easy-user-input/

easy_input.py

#!/usr/bin/env python
# coding: utf-8


def easy_input(question, answer=None, default=None):
    """Ask a question, return an answer.

    <question> is a string that is presented to the user.
    <answer> is a list of strings presented as a choice. User may type only first letters
    <default> is the presumed answer if the user just hits <Enter>.

    """

    if answer is None:
        answer = ['yes', 'no']
    else:
        answer = [i.lower() for i in answer]

    # if <default> is None or <default> is not an expected answers
    # <default> will be the first of the expected answers
    if default is None or default not in answer:
        default = answer[0]

    prompt = '/'.join([
        "\x1b[1;1m{0}\x1b[1;m".format(i.capitalize()) if i == default else i
        for i in answer
    ])

    while True:
        choice = raw_input("{0} [{1}]: ".format(question, prompt)).lower()

        if default is not None and choice == '':
            return default
        if choice in answer:
            return choice

        valid_answer = {i[:len(choice)]: i for i in answer}

        if len(valid_answer) < len(answer):
            print(" -- Ambiguous, please use a more detailed answer.")
        elif choice in valid_answer:
            return valid_answer[choice]
        else:
            print(" -- Please answer only with {0} or {1}.".format(", ".join(answer[:-1]), answer[-1]))

if __name__ == '__main__':
    u = easy_input("vous habitez chez vos parents ?")
    print("\nanswer was : {0}\n".format(u))

    u = easy_input("ajouter au gloubiboulga ?", ['carotte', 'rutabaga', 'pomepeche'])
    print("\nanswer was : {0}\n".format(u))

    u = easy_input("alors, on dance ?", ['non', 'nui'], 'oui')
    print("\nanswer was : {0}\n".format(u))

    u = easy_input("question piège ?", ['continue', 'testicle', 'test', ])
    print("\nanswer was : {0}\n".format(u))