def _update_members(self):
    for member in self.members.values():
        if (not member.experiment):
            member.added_to_experiment(self.exp)
        if (not member.section):
            member.added_to_section(self)
def _update_members(self):
    for member in self.members.values():
        if (not member.experiment):
            member.added_to_experiment(self.exp)
        if (not member.section):
            member.added_to_section(self)