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BUG: string methods with NA #31684

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Merged
merged 4 commits into from
Mar 10, 2020
Merged

BUG: string methods with NA #31684

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7d5e4f8
BUG: Series.str.repeat can handle pd.NA for vectored inputs (#31632)
prakhar987 Feb 8, 2020
5c59289
Moved test to seperate function
prakhar987 Feb 10, 2020
11d9670
Used is instead of isinstance and added dtype to series in tests
prakhar987 Feb 11, 2020
3e50a2c
Style fix
prakhar987 Feb 11, 2020
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4 changes: 4 additions & 0 deletions doc/source/whatsnew/v1.0.2.rst
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Expand Up @@ -29,6 +29,10 @@ Bug fixes

- Using ``pd.NA`` with :meth:`DataFrame.to_json` now correctly outputs a null value instead of an empty object (:issue:`31615`)

**Strings**

- Using ``pd.NA`` with :meth:`Series.str.repeat` now correctly outputs a null value instead of raising error for vector inputs (:issue:`31632`)

.. ---------------------------------------------------------------------------

.. _whatsnew_102.contributors:
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2 changes: 2 additions & 0 deletions pandas/core/strings.py
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Expand Up @@ -778,6 +778,8 @@ def scalar_rep(x):
else:

def rep(x, r):
if x is libmissing.NA:
return x
try:
return bytes.__mul__(x, r)
except TypeError:
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12 changes: 12 additions & 0 deletions pandas/tests/test_strings.py
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Expand Up @@ -1153,6 +1153,18 @@ def test_repeat(self):
assert isinstance(rs, Series)
tm.assert_series_equal(rs, xp)

def test_repeat_with_null(self):
# GH: 31632
values = Series(["a", None], dtype="string")
result = values.str.repeat([3, 4])
exp = Series(["aaa", None], dtype="string")
tm.assert_series_equal(result, exp)

values = Series(["a", "b"], dtype="string")
result = values.str.repeat([3, None])
exp = Series(["aaa", None], dtype="string")
tm.assert_series_equal(result, exp)

def test_match(self):
# New match behavior introduced in 0.13
values = Series(["fooBAD__barBAD", np.nan, "foo"])
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