Warning
Starting with the 0.25.x series of releases, pandas only supports Python 3.5 and higher. See :ref:`install.dropping-27` for more details.
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These are the changes in pandas 0.25.0. See :ref:`release` for a full changelog including other versions of pandas.
- Indexing of
DataFrameandSeriesnow accepts zerodimnp.ndarray(:issue:`24919`) - :meth:`Timestamp.replace` now supports the
foldargument to disambiguate DST transition times (:issue:`25017`) - :meth:`DataFrame.at_time` and :meth:`Series.at_time` now support :meth:`datetime.time` objects with timezones (:issue:`24043`)
- :meth:`DatetimeIndex.union` now supports the
sortargument. The behaviour of the sort parameter matches that of :meth:`Index.union` (:issue:`24994`)
- :meth:`Timestamp.strptime` will now raise a NotImplementedError (:issue:`25016`)
- :class:`DatetimeTZDtype` will now standardize pytz timezones to a common timezone instance (:issue:`24713`)
TimestampandTimedeltascalars now implement the :meth:`to_numpy` method as aliases to :meth:`Timestamp.to_datetime64` and :meth:`Timedelta.to_timedelta64`, respectively. (:issue:`24653`)
- Deprecated the M (months) and Y (year) units parameter of :func: pandas.to_timedelta, :func: pandas.Timedelta and :func: pandas.TimedeltaIndex (:issue:`16344`)
- Removed (parts of) :class:`Panel` (:issue:`25047`,:issue:25191,:issue:25231)
- Significant speedup in SparseArray initialization that benefits most operations, fixing performance regression introduced in v0.20.0 (:issue:`24985`)
- DataFrame.to_stata() is now faster when outputting data with any string or non-native endian columns (:issue:`25045`)
- Bug in :func:`to_datetime` with
utc=Trueand datetime strings that would apply previously parsed UTC offsets to subsequent arguments (:issue:`24992`) - Bug in :func:`Timestamp.tz_localize` and :func:`Timestamp.tz_convert` does not propagate
freq(:issue:`25241`)
- Bug in :meth:`to_numeric` in which large negative numbers were being improperly handled (:issue:`24910`)
- Bug in :meth:`to_numeric` in which numbers were being coerced to float, even though
errorswas notcoerce(:issue:`24910`)
- Fixed misleading exception message in :meth:`Series.missing` if argument
orderis required, but omitted (:issue:`10633`, :issue:`24014`).
- Bug in which incorrect exception raised by :meth:`pd.Timedelta` when testing the membership of :class:`MultiIndex` (:issue:`24570`)
- Fixed bug in missing text when using :meth:`to_clipboard` if copying utf-16 characters in Python 3 on Windows (:issue:`25040`)
- Bug in :func:`read_json` for
orient='table'when it tries to infer dtypes by default, which is not applicable as dtypes are already defined in the JSON schema (:issue:`21345`)
- Bug in :meth:`pandas.core.resample.Resampler.agg` with a timezone aware index where
OverflowErrorwould raise when passing a list of functions (:issue:`22660`) - Bug in :func:`pandas.core.groupby.GroupBy.agg` when applying a aggregation function to timezone aware data (:issue:`23683`)
- Bug in :func:`pandas.core.groupby.GroupBy.first` and :func:`pandas.core.groupby.GroupBy.last` where timezone information would be dropped (:issue:`21603`)
- Bug in :func:`pandas.merge` adds a string of
NoneifNoneis assigned in suffixes instead of remain the column name as-is (:issue:`24782`). - Bug in :func:`merge` when merging by index name would sometimes result in an incorrectly numbered index (:issue:`24212`)
- :func:`to_records` now accepts dtypes to its column_dtypes parameter (:issue:`24895`)
- Significant speedup in SparseArray initialization that benefits most operations, fixing performance regression introduced in v0.20.0 (:issue:`24985`)
.. contributors:: v0.24.x..HEAD