human
Complete this python program:
def check_for_prefix_and_key(function):
assistant
#Here is the Python program you requested.

    """Automatically return false if the key or prefix is not in the callbacks
    for the instance.
    """
    @functools.wraps(function)
    def wrapper(*args, **kwargs):
        offset = 1
        if ('prefix' in kwargs):
            prefix = name_or_value(kwargs['prefix'])
        else:
            prefix = name_or_value(args[offset])
            offset += 1
        if ('key' in kwargs):
            key = name_or_value(kwargs['key'])
        else:
            key = name_or_value(args[offset])
        if ((prefix not in args[0]._stack) or (key not in args[0]._stack[prefix])):
            return False
        return function(*args, **kwargs)
    return wrapper