from otree.api import * class C(BaseConstants): NAME_IN_URL = 'feedback' PLAYERS_PER_GROUP = None NUM_ROUNDS = 1 class Subsession(BaseSubsession): pass class Group(BaseGroup): pass class Player(BasePlayer): feedback_text = models.StringField( blank=True, label='Is there any feedback you could give to us?') # PAGES class Feedback(Page): form_model = 'player' form_fields = ['feedback_text'] page_sequence = [Feedback]