def test_summary_with_mean():
    (chunk, chunk_expr), (agg, agg_expr) = split(t, summary(a=t.amount.count(),
                                                            b=t.id.mean() + 1))

    assert chunk.schema == t.schema
    assert chunk_expr.isidentical(summary(a=chunk.amount.count(),
                                          b_total=chunk.id.sum(),
                                          b_count=chunk.id.count(),
                                          keepdims=True))

    # assert not agg.schema == dshape('{a: int32, b: int32}')
    expected = summary(a=agg.a.sum(),
                       b=(agg.b_total.sum() - agg.b_count.sum()) + 1)
    assert agg_expr.isidentical(expected)
dataset/ETHPy150Open blaze/blaze/blaze/expr/tests/test_split.py/test_summary_with_mean/operator `/` -> `-`