def save_view(self,vw,subject,name,is_overwrite=False):
        view = vw._capture_view()
        sName = os.path.join(self.filestore, subject, "views", name+'.json')
        if os.path.exists(sName):
            if not is_overwrite:
                raise IOError('Refusing to over-write extant view If you want to do this, set is_overwrite=True!')
        json.dump(view,open(sName,'w'))
:param days:
dataset/ETHPy150Open gallantlab/pycortex/cortex/database.py/Database.save_view--crossover with--dataset/ETHPy150Open rohe/pyoidc/src/oic/utils/time_util.py/in_a_while