| 498 | "ignore:invalid value encountered in (true_)?divide:RuntimeWarning" |
| 499 | ) |
| 500 | def test_describe_empty(): |
| 501 | df_none = pd.DataFrame({"A": [None, None]}) |
| 502 | ddf_none = dd.from_pandas(df_none, 2) |
| 503 | df_len0 = pd.DataFrame({"A": [], "B": []}) |
| 504 | ddf_len0 = dd.from_pandas(df_len0, 2) |
| 505 | ddf_nocols = dd.from_pandas(pd.DataFrame({}), 2) |
| 506 | |
| 507 | assert_eq(df_none.describe(), ddf_none.describe(percentiles_method="dask")) |
| 508 | assert_eq(df_len0.describe(), ddf_len0.describe(percentiles_method="dask")) |
| 509 | with pytest.raises(ValueError): |
| 510 | ddf_nocols.describe(percentiles_method="dask").compute() |
| 511 | |
| 512 | |
| 513 | def test_describe_empty_tdigest(): |