from otree.api import * doc = """ Your app description """ class C(BaseConstants): NAME_IN_URL = 'Consent' PLAYERS_PER_GROUP = None NUM_ROUNDS = 1 class Subsession(BaseSubsession): pass class Group(BaseGroup): pass class Player(BasePlayer): accept_consent = models.BooleanField( label='I agree and accept the conditions specified above.', blank=False, widget=widgets.CheckboxInput()) code = models.StringField() # PAGES class Consent(Page): form_model = 'player' form_fields = ['accept_consent', 'code'] page_sequence = [Consent]