def state_forwards(self, app_label, state):
        raise NotImplementedError('subclasses of Operation must provide a state_forwards() method')
Get an answer from stdin, the answers should be 'Y/n' etc.
dataset/ETHPy150Open django/django/django/db/migrations/operations/base.py/Operation.state_forwards--crossover with--dataset/ETHPy150Open limodou/uliweb/uliweb/core/commands.py/get_answer