BUG: Indexing MultiIndex with Series failed. #15041
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Previously, accessing elements of a MultiIndex-indexed DataFrame with a Series failed. This changes that behavior so that it is possible to use a Series to access elements from a MultiIndex-indexed DataFrame, just as one would use a list.
jreback requested changes Jan 3, 2017
pandas/tests/indexes/test_multi.py Outdated
| # GH14730 | ||
| index = MultiIndex.from_product([[1, 2, 3], ['A', 'B', 'C']]) | ||
| x = Series(index=index, data=range(9)) | ||
| y = Series([1, 3]) |
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put this is tests/test_multilevel or test_indexing
find a very similar test (iow indexing a mi with list/ndarray) and put after
pandas/tests/indexes/test_multi.py Outdated
| actual_from_series = x.loc[y] | ||
| actual_from_list = x.loc[[1, 3]] | ||
| tm.assert_series_equal(expected, actual_from_list) | ||
| tm.assert_series_equal(expected, actual_from_series) |
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result = ...
expected = ....
assert_series_equal(result, expected)
| tm.assert_series_equal(expected, actual_from_series) | ||
| | ||
| def test_set_levels_categorical(self): | ||
| # GH13854 |
| if (not isinstance(key, tuple) and len(key) > 1 and | ||
| not isinstance(key[0], tuple)): | ||
| if isinstance(key, ABCSeries): | ||
| # GH 14730 |
Contributor
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you can prob just
list(key)
Contributor Author
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I thought taking the .values was more explicit, but list is probably more familiar. Changed.
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no .values is fraught with issues as it converts dtypes, we don't use it internally if at all possible.
sinhrks added Bug Indexing 
Current coverage is 84.75% (diff: 100%)@@ master #15041 diff @@ ========================================== Files 145 145 Lines 51129 51141 +12 Methods 0 0 Messages 0 0 Branches 0 0 ========================================== + Hits 43343 43345 +2 - Misses 7786 7796 +10 Partials 0 0
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added 2 commits January 3, 2017 10:38
Contributor
| thanks @bkandel (I moved the tests to the appropriate location) |
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Previously, accessing elements of a MultiIndex-indexed DataFrame with a Series
failed. This changes that behavior so that it is possible to use a Series to
access elements from a MultiIndex-indexed DataFrame, just as one would use
a list.
git diff upstream/master | flake8 --diff