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BUG: Fix interpolate ValueError for datetime64_tz index #27549

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Merged
merged 6 commits into from
Jul 24, 2019
Merged

BUG: Fix interpolate ValueError for datetime64_tz index #27549

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87ba640
BUG: Fix interpolate ValueError for datetime64_tz index
alorenzo175 Jul 23, 2019
6326908
add change to whatsnew
alorenzo175 Jul 23, 2019
993feb5
remove unused import
alorenzo175 Jul 23, 2019
41e1311
fix whatsnew description
alorenzo175 Jul 23, 2019
9c94eb8
more whatsnew fix
alorenzo175 Jul 23, 2019
a04fec6
parametrize test with tz_naive_fixture
alorenzo175 Jul 23, 2019
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2 changes: 1 addition & 1 deletion doc/source/whatsnew/v0.25.1.rst
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Expand Up @@ -56,7 +56,7 @@ Timezones

Numeric
^^^^^^^
-
- Bug in :meth:`interpolate` when using a timezone aware :class:`DatetimeIndex` (:issue:`27548`)
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this won't render, you want :meth:`Series.interpolate`

-
-

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3 changes: 1 addition & 2 deletions pandas/core/generic.py
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Expand Up @@ -30,7 +30,6 @@
is_bool,
is_bool_dtype,
is_datetime64_any_dtype,
is_datetime64_dtype,
is_datetime64tz_dtype,
is_dict_like,
is_extension_array_dtype,
Expand Down Expand Up @@ -7023,7 +7022,7 @@ def interpolate(
methods = {"index", "values", "nearest", "time"}
is_numeric_or_datetime = (
is_numeric_dtype(index)
or is_datetime64_dtype(index)
or is_datetime64_any_dtype(index)
or is_timedelta64_dtype(index)
)
if method not in methods and not is_numeric_or_datetime:
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15 changes: 13 additions & 2 deletions pandas/tests/series/test_missing.py
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Expand Up @@ -1521,12 +1521,23 @@ def test_interp_nonmono_raise(self):
s.interpolate(method="krogh")

@td.skip_if_no_scipy
def test_interp_datetime64(self):
@pytest.mark.parametrize("method", ["nearest", "pad"])
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you can parametrize on tz_naive_fixture here (and just remove the bottom test); this includes None and a bunch of timezones.

def test_interp_datetime64(self, method):
df = Series([1, np.nan, 3], index=date_range("1/1/2000", periods=3))
result = df.interpolate(method="nearest")
result = df.interpolate(method=method)
expected = Series([1.0, 1.0, 3.0], index=date_range("1/1/2000", periods=3))
assert_series_equal(result, expected)

@td.skip_if_no_scipy
@pytest.mark.parametrize("method", ["nearest", "pad"])
def test_interp_datetime64_tz(self, method):
df = Series([1, np.nan, 3], index=date_range("1/1/2000", periods=3, tz="UTC"))
result = df.interpolate(method=method)
expected = Series(
[1.0, 1.0, 3.0], index=date_range("1/1/2000", periods=3, tz="UTC")
)
assert_series_equal(result, expected)

def test_interp_limit_no_nans(self):
# GH 7173
s = pd.Series([1.0, 2.0, 3.0])
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