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DOC: Remove use of as_type for PeriodIndex to DatetimeIndex conversion #44447

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Nov 14, 2021
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DOC: Remove use of as_type for PeriodIndex to DatetimeIndex conversion #44447

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10 changes: 7 additions & 3 deletions doc/source/user_guide/timeseries.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -2073,14 +2073,18 @@ The ``period`` dtype can be used in ``.astype(...)``. It allows one to change th
# change monthly freq to daily freq
pi.astype("period[D]")

# convert to DatetimeIndex
pi.astype("datetime64[ns]")

# convert to PeriodIndex
dti = pd.date_range("2011-01-01", freq="M", periods=3)
dti
dti.astype("period[M]")

.. deprecated:: 1.4.0
Converting PeriodIndex to DatetimeIndex with ``.astype(...)`` is deprecated and will raise in a future version. Use ``obj.to_timestamp(how).tz_localize(dtype.tz)`` instead.

.. ipython:: python

# convert to DatetimeIndex
pi.to_timestamp(how="start")

PeriodIndex partial string indexing
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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