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clean CategoricalIndex.get_loc and improve error message #23091

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Merged
merged 1 commit into from
Oct 18, 2018
Merged

clean CategoricalIndex.get_loc and improve error message #23091

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11 changes: 8 additions & 3 deletions pandas/core/indexes/category.py
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Original file line number Diff line number Diff line change
Expand Up @@ -426,6 +426,10 @@ def get_loc(self, key, method=None):
-------
loc : int if unique index, slice if monotonic index, else mask

Raises
------
KeyError : if the key is not in the index

Examples
---------
>>> unique_index = pd.CategoricalIndex(list('abc'))
Expand All @@ -440,10 +444,11 @@ def get_loc(self, key, method=None):
>>> non_monotonic_index.get_loc('b')
array([False, True, False, True], dtype=bool)
"""
codes = self.categories.get_loc(key)
if (codes == -1):
code = self.categories.get_loc(key)
try:
return self._engine.get_loc(code)
except KeyError:
raise KeyError(key)
return self._engine.get_loc(codes)

def get_value(self, series, key):
"""
Expand Down