from otree.api import * c = cu doc = '' class C(BaseConstants): NAME_IN_URL = 'ID_participant' PLAYERS_PER_GROUP = None NUM_ROUNDS = 1 class Subsession(BaseSubsession): pass class Group(BaseGroup): pass class Player(BasePlayer): ParticipantID = models.StringField(label='Please enter the participant ID assigned to you by the experimenter') class ID_page(Page): form_model = 'player' form_fields = ['ParticipantID'] page_sequence = [ID_page]