10000 BUG: allow empty multiindex (fixes .isin regression, GH16777) by drudd · Pull Request #16782 · pandas-dev/pandas · GitHub
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BUG: allow empty multiindex (fixes .isin regression, GH16777) #16782

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Merged
merged 11 commits into from
Jul 7, 2017
Merged

BUG: allow empty multiindex (fixes .isin regression, GH16777) #16782

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17204a6
BUG: allow empty multiindex (fixes .isin regression, GH16777)
Jun 27, 2017
474ff40
BUG: allow empty multiindex (fixes .isin regression, GH16777)
Jun 27, 2017
64908e8
Replace incorrect use of self._levels with self._names
Jun 27, 2017
76967db
Requested change to whats-new
Jul 6, 2017
c84f0bc
Use names property rather than _names in MultiIndex.isin
Jul 6, 2017
f94d2b4
Revert ability to construct MultiIndex from empty arrays, ensure all …
Jul 6, 2017
fe1e043
Remove empty list checks in MultiIndex.__new__
Jul 6, 2017
b0778f0
Remove empty array check in .from_arrays, falling back to check in __…
Jul 6, 2017
e3d670a
Fix for pep8
Jul 6, 2017
39b544a
Split empty from_tuples test
Jul 6, 2017
94ac6b1
add commit number to test
jreback Jul 7, 2017
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Use names property rather than _names in MultiIndex.isin
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@jreback
Douglas Rudd authored and jreback committed Jul 7, 2017
commit c84f0bc1e5a1cda712b4f91045d761c6e92a8975
2 changes: 1 addition & 1 deletion pandas/core/indexes/multi.py
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Expand Up @@ -2624,7 +2624,7 @@ def _wrap_joined_index(self, joined, other):
def isin(self, values, level=None):
if level is None:
values = MultiIndex.from_tuples(values,
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you might be able to change this to _ensure_index(values) I think (as its more idiomatic). I also don't think you will need the .values

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_ensure_index is not meant to support values for a MultiIndex I think:

In [159]: pd.core.indexes.base._ensure_index([(1, 2), (3, 4)])
Out[159]: Index([(1, 2), (3, 4)], dtype='object')

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Not able to address this before 0.20.3

names=self._names).values
names=self.names).values
return algos.isin(self.values, values)
else:
num = self._get_level_number(level)
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