Warning
Starting with the 0.25.x series of releases, pandas only supports Python 3.5.3 and higher. See :ref:`install.dropping-27` for more details.
Warning
The minimum supported Python version will be bumped to 3.6 in a future release.
{{ header }}
These are the changes in pandas 1.0.0. See :ref:`release` for a full changelog including other versions of pandas.
- :class:`pandas.core.groupby.GroupBy.transform` now raises on invalid operation names (:issue:`27489`).
Supporting Python 3.6, we are not able to take advantage of new types added to the typing module. The typing_extensions module contains both backports of these changes as well as experimental types that will eventually be added to the typing module.
If installed, we now require:
| Package | Minimum Version | Required |
|---|---|---|
| typing_extensions (dev) |
For optional libraries the general recommendation is to use the latest version. The following table lists the lowest version per library that is currently being tested throughout the development of pandas. Optional libraries below the lowest tested version may still work, but are not considered supported.
| Package | Minimum Version |
|---|---|
See :ref:`install.dependencies` and :ref:`install.optional_dependencies` for more.
- :meth:`pandas.api.types.infer_dtype` will now return "integer-na" for integer and
np.nanmix (:issue:`27283`)
- Removed the previously deprecated :meth:`Series.get_value`, :meth:`Series.set_value`, :meth:`DataFrame.get_value`, :meth:`DataFrame.set_value` (:issue:`17739`)
- Changed the the default value of inplace in :meth:`DataFrame.set_index` and :meth:`Series.set_axis`. It now defaults to False (:issue:`27600`)
- :meth:`pandas.Series.str.cat` now defaults to aligning
others, usingjoin='left'(:issue:`27611`) - :meth:`pandas.Series.str.cat` does not accept list-likes within list-likes anymore (:issue:`27611`)
- Performance improvement in indexing with a non-unique :class:`IntervalIndex` (:issue:`27489`)
- Performance improvement in MultiIndex.is_monotonic (:issue:`27495`)
- Performance improvement in :func:`cut` when
binsis an :class:`IntervalIndex` (:issue:`27668`)
- Bug in :meth:`Series.__setitem__` incorrectly casting
np.timedelta64("NaT")tonp.datetime64("NaT")when inserting into a :class:`Series` with datetime64 dtype (:issue:`27311`) - Bug in :meth:`Series.dt` property lookups when the underlying data is read-only (:issue:`27529`)
- Bug in :meth:`DataFrame.quantile` with zero-column :class:`DataFrame` incorrectly raising (:issue:`23925`)