Skip to content

TST: NaN in MultiIndex should not become a string (#7031) #16625

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 8, 2017
Merged

TST: NaN in MultiIndex should not become a string (#7031) #16625

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
21 changes: 21 additions & 0 deletions pandas/tests/indexes/test_multi.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2858,3 +2858,24 @@ def test_tuples_with_name_string(self):
pd.Index(li, name='abc')
with pytest.raises(ValueError):
pd.Index(li, name='a')

def test_nan_stays_float(self):

# GH 7031
idx0 = pd.MultiIndex(levels=[["A", "B"], []],
labels=[[1, 0], [-1, -1]],
names=[0, 1])
idx1 = pd.MultiIndex(levels=[["C"], ["D"]],
labels=[[0], [0]],
names=[0, 1])
idxm = idx0.join(idx1, how='outer')
assert pd.isnull(idx0.get_level_values(1)).all()
# the following failed in 0.14.1
assert pd.isnull(idxm.get_level_values(1)[:-1]).all()

df0 = pd.DataFrame([[1, 2]], index=idx0)
df1 = pd.DataFrame([[3, 4]], index=idx1)
dfm = df0 - df1
assert pd.isnull(df0.index.get_level_values(1)).all()
# the following failed in 0.14.1
assert pd.isnull(dfm.index.get_level_values(1)[:-1]).all()