These are the changes in pandas 1.3.1. See :ref:`release` for a full changelog including other versions of pandas.
{{ header }}
- Pandas could not be built on PyPy (:issue:`42355`)
- :class:`DataFrame` constructed with with an older version of pandas could not be unpickled (:issue:`42345`)
- Performance regression in constructing a :class:`DataFrame` from a dictionary of dictionaries (:issue:`42338`)
.. contributors:: v1.3.0..v1.3.1|HEAD