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fix: fix df/series.iloc by list with multiindex #79

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Merged
merged 2 commits into from
Oct 3, 2023
Merged

fix: fix df/series.iloc by list with multiindex #79

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4fedfbd
fix: fix df/series.iloc by list with multiindex
Oct 2, 2023
ff72da5
fix git error
Oct 2, 2023
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15 changes: 8 additions & 7 deletions bigframes/core/indexers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -332,8 +332,6 @@ def _iloc_getitem_series_or_dataframe(
elif isinstance(key, slice):
return series_or_dataframe._slice(key.start, key.stop, key.step)
elif pd.api.types.is_list_like(key):
# TODO(henryjsolberg): support MultiIndex

if len(key) == 0:
return typing.cast(
typing.Union[bigframes.dataframe.DataFrame, bigframes.series.Series],
Expand All @@ -346,15 +344,18 @@ def _iloc_getitem_series_or_dataframe(
original_series_name if original_series_name is not None else "0"
)
df = series_or_dataframe.to_frame()
original_index_name = df.index.name
temporary_index_name = guid.generate_guid(prefix="temp_iloc_index_")
df = df.rename_axis(temporary_index_name)
original_index_names = df.index.names
temporary_index_names = [
guid.generate_guid(prefix="temp_iloc_index_")
for _ in range(len(df.index.names))
]
df = df.rename_axis(temporary_index_names)

# set to offset index and use regular loc, then restore index
df = df.reset_index(drop=False)
result = df.loc[key]
result = result.set_index(temporary_index_name)
result = result.rename_axis(original_index_name)
result = result.set_index(temporary_index_names)
result = result.rename_axis(original_index_names)

if isinstance(series_or_dataframe, bigframes.series.Series):
result = result[series_name]
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18 changes: 18 additions & 0 deletions tests/system/small/test_dataframe.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2525,6 +2525,24 @@ def test_iloc_list(scalars_df_index, scalars_pandas_df_index):
)


def test_iloc_list_multiindex(scalars_dfs):
scalars_df, scalars_pandas_df = scalars_dfs
scalars_df = scalars_df.copy()
scalars_pandas_df = scalars_pandas_df.copy()
scalars_df = scalars_df.set_index(["bytes_col", "numeric_col"])
scalars_pandas_df = scalars_pandas_df.set_index(["bytes_col", "numeric_col"])

index_list = [0, 0, 0, 5, 4, 7]

bf_result = scalars_df.iloc[index_list]
pd_result = scalars_pandas_df.iloc[index_list]

pd.testing.assert_frame_equal(
bf_result.to_pandas(),
pd_result,
)


def test_iloc_empty_list(scalars_df_index, scalars_pandas_df_index):
index_list = []

Expand Down