def __init__(self, *args, **kwargs):
        kwargs['blank'] = True
        if 'default' not in kwargs and not kwargs.get('null'):
            kwargs['default'] = False
        Field.__init__(self, *args, **kwargs)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/db/models/fields/__init__.py/BooleanField.__init__/original