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Public API for extension arrays / types. #23532

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df14c8f
API/DOC: Add EAs to public API
TomAugspurger Oct 30, 2018
b9eac0a
smaller API
TomAugspurger Nov 6, 2018
2e492bc
update categorical docs
TomAugspurger Nov 6, 2018
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6 changes: 2 additions & 4 deletions doc/source/advanced.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -717,11 +717,9 @@ and allows efficient indexing and storage of an index with a large number of dup

.. ipython:: python

from pandas.api.types import CategoricalDtype

df = pd.DataFrame({'A': np.arange(6),
'B': list('aabbca')})
df['B'] = df['B'].astype(CategoricalDtype(list('cab')))
df['B'] = df['B'].astype(pd.CategoricalDtype(list('cab')))
df
df.dtypes
df.B.cat.categories
Expand All @@ -747,7 +745,7 @@ The ``CategoricalIndex`` is **preserved** after indexing:
df2.loc['a'].index

Sorting the index will sort by the order of the categories (recall that we
created the index with ``CategoricalDtype(list('cab'))``, so the sorted
created the index with ``pd.CategoricalDtype(list('cab'))``, so the sorted
order is ``cab``).

.. ipython:: python
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