def remove_user_present(self, username):

        if self['state']['open'] and 'people_now_present' in self['sensors']:

            people_now_present = self['sensors']['people_now_present']

            if people_now_present['value'] > 0:

                people_now_present['value'] -= 1

            if 'names' in people_now_present:

                if people_now_present['value'] == 0:

                    del people_now_present['names']

                elif username in people_now_present['names']:

                    people_now_present['names'].remove(username)

                    if not people_now_present['names']:

                        del people_now_present['names']

            self['sensors']['people_now_present'] = people_now_present

        else:

            pass

    def set_new_state(self, value=None, trigger_person=None, message=None):

        if value is not None:

            self['state']['open'] = value

            if 'twitter_consumer_key' in current_app.config:

                auth = tweepy.OAuthHandler(

                    current_app.config['twitter_consumer_key'],

                    current_app.config['twitter_consumer_secret']

                )

                auth.set_access_token(

                    current_app.config['twitter_access_token_key'],

                    current_app.config['twitter.access_token_secret']

                )

                api = tweepy.API(auth)

                if value:

                    api.update_status('The space is now open!')

                else:

                    api.update_status('The space is now closed!')

            if not value:

                if 'people_now_present' in self['sensors']:

                    self['sensors']['people_now_present']['value'] = 0

                    if 'names' in self['sensors']['people_now_present']:

                        del self['sensors']['people_now_present']['names']

                if 'message' in self['state']:

                    del self['state']['message']

        if trigger_person is not None:

            self['state']['trigger_person'] = trigger_person

        if message is not None:

            self['state']['message'] = message

        if value is not None or trigger_person is not None or message is not None:

            self['state']['lastchange'] = int(time())

def request_wants_json():

    best = request.accept_mimetypes.best_match(

        ['application/json', 'text/html']

    )

    return best == 'application/json' and \

        request.accept_mimetypes[best] > \

        request.accept_mimetypes['text/html']

def fuzzy_list_find(lst, key, value):

    for i, dic in enumerate(lst):

        if dic[key] == value:

            return i

    raise ValueError

def first(iterable, keys):

    for key in keys:

        if key in iterable:

            return key

    raise ValueError