Skip to content

TST: Add test for groupby sum of large ints #16671

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

Merged
merged 1 commit into from
Jun 12, 2017
+17 −0
Merged

TST: Add test for groupby sum of large ints #16671

Changes from all commits
Commits
Show all changes
1 commit
Select commit
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
17 changes: 17 additions & 0 deletions pandas/tests/groupby/test_aggregate.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -865,3 +865,20 @@ def test_agg_timezone_round_trip(self):
ts = df['B'].iloc[2]
assert ts == grouped.last()['B'].iloc[0]
assert ts == grouped.apply(lambda x: x.iloc[-1])[0]

def test_sum_uint64_overflow(self):
# see gh-14758

# Convert to uint64 and don't overflow
df = pd.DataFrame([[1, 2], [3, 4], [5, 6]],
dtype=object) + 9223372036854775807

index = pd.Index([9223372036854775808, 9223372036854775810,
9223372036854775812], dtype=np.uint64)
expected = pd.DataFrame({1: [9223372036854775809,
9223372036854775811,
9223372036854775813]}, index=index)

expected.index.name = 0
result = df.groupby(0).sum()
tm.assert_frame_equal(result, expected)