def __len__(self):
        return len(self.visible())
diffdict and difflist are recursive methods which build an HTML representation of the differences between two objects.
dataset/ETHPy150Open bradleyayers/django-tables2/django_tables2/columns/base.py/BoundColumns.__len__--crossover with--dataset/ETHPy150Open Netflix/security_monkey/security_monkey/common/PolicyDiff.py/diffdict