A somewhat flexible (could be better) user question response

user_prompt.py

#!/usr/bin/env python3

def ask(question, response_dict):
    choices = '/'.join(response_dict.keys())
    response = input(f'{question} ({choices}): ').lower().strip()
    try:
        default = response_dict[[k for k in response_dict.keys() if k.isupper()][0]]
    except IndexError:
        default = None

    try:
        if default is not None and not response:
            return default
        return response_dict[response]
    except KeyError:
        try:
            return response_dict[response.upper()]
        except KeyError:
            pass
        print(f'Please choose from: {choices}')
        return ask(question, response_dict)

print(ask('Send email?', {'Y': True, 'n': False}))