v1.4.0.rst

What's new in 1.4.0 (??)

These are the changes in pandas 1.4.0. See :ref:`release` for a full changelog including other versions of pandas.

{{ header }}

Enhancements

enhancement1

enhancement2

Other enhancements

Notable bug fixes

These are bug fixes that might have notable behavior changes.

notable_bug_fix1

notable_bug_fix2

Backwards incompatible API changes

Increased minimum versions for dependencies

Some minimum supported versions of dependencies were updated. If installed, we now require:

Package	Minimum Version	Required	Changed
		X	X

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	Changed
		X

See :ref:`install.dependencies` and :ref:`install.optional_dependencies` for more.

Other API changes

Deprecations

• Deprecated :meth:`Index.is_type_compatible` (:issue:`42113`)

Performance improvements

Bug fixes

Categorical

Datetimelike

Timedelta

Timezones

Numeric

Conversion

Strings

Interval

Indexing

Missing

MultiIndex

• Bug in :meth:`MultiIndex.reindex` when passing a level that corresponds to an ExtensionDtype level (:issue:`42043`)

I/O

Period

Plotting

Groupby/resample/rolling

• Bug in :meth:`GroupBy.shift` that would return different columns if fill_value was not None (:issue:`41556`)

Reshaping

Sparse

ExtensionArray

Styler

Other

Contributors