Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Don't reindex an new value on setitem if the original dataframe was empty #8026

Merged
merged 3 commits into from
Apr 22, 2021
Merged

Don't reindex an new value on setitem if the original dataframe was empty #8026

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
9909706
Don't reindex an input dataframe on setitem if the original dataframe…
vyasr Apr 21, 2021
9e7b7ca
Add test.
vyasr Apr 22, 2021
8bee629
Check if df is empty before trying equality check for speed
vyasr Apr 22, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion python/cudf/cudf/core/dataframe.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7953,7 +7953,7 @@ def _setitem_with_dataframe(
"Number of Input Columns must be same replacement Dataframe"
)

if not input_df.index.equals(replace_df.index):
if len(input_df) != 0 and not input_df.index.equals(replace_df.index):
replace_df = replace_df.reindex(input_df.index)

for col_1, col_2 in zip(input_cols, replace_df.columns):
Expand Down
7 changes: 7 additions & 0 deletions python/cudf/cudf/tests/test_dataframe.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1070,6 +1070,13 @@ def test_dataframe_setitem_index_len1():
np.testing.assert_equal(gdf.b.to_array(), [0])


def test_empty_dataframe_setitem_df():
gdf1 = cudf.DataFrame()
gdf2 = cudf.DataFrame({"a": [1, 2, 3, 4, 5]})
gdf1["a"] = gdf2["a"]
assert_eq(gdf1, gdf2)


def test_assign():
gdf = cudf.DataFrame({"x": [1, 2, 3]})
gdf2 = gdf.assign(y=gdf.x + 1)
Expand Down