test_blaze.py 文件源码

def test_auto_deltas(self):
        expr = bz.data(
            {'ds': self.df,
             'ds_deltas': pd.DataFrame(columns=self.df.columns)},
            dshape=var * Record((
                ('ds', self.dshape.measure),
                ('ds_deltas', self.dshape.measure),
            )),
        )
        loader = BlazeLoader()
        ds = from_blaze(
            expr.ds,
            loader=loader,
            missing_values=self.missing_values,
        )
        self.assertEqual(len(loader), 1)
        exprdata = loader[ds]
        self.assertTrue(exprdata.expr.isidentical(expr.ds))
        self.assertTrue(exprdata.deltas.isidentical(expr.ds_deltas))