What's new in 1.2.1 (January ??, 2021)

These are the changes in pandas 1.2.1. See :ref:`release` for a full changelog including other versions of pandas.

Fixed regressions

The deprecated attributes _AXIS_NAMES and _AXIS_NUMBERS of :class:`DataFrame` and :class:`Series` will no longer show up in dir or inspect.getmembers calls (:issue:`38740`)
:meth:`to_csv` created corrupted zip files when there were more rows than chunksize (issue:38714)
Fixed a regression in groupby().rolling() where :class:`MultiIndex` levels were dropped (:issue:`38523`)
Bug in repr of float-like strings of an object dtype having trailing 0's truncated after the decimal (:issue:`38708`)
Fixed regression in :meth:`DataFrame.groupby()` with :class:`Categorical` grouping column not showing unused categories for grouped.indices (:issue:`38642`)
Fixed regression in :meth:`DataFrame.any` and :meth:`DataFrame.all` not returning a result for tz-aware datetime64 columns (:issue:`38723`)
Fixed regression in :meth:`.GroupBy.sem` where the presence of non-numeric columns would cause an error instead of being dropped (:issue:`38774`)
:func:`read_excel` does not work for non-rawbyte file handles (issue:38788)
Bug in :meth:`read_csv` with float_precision="high" caused segfault or wrong parsing of long exponent strings (:issue:`38753`)

Bumped minimum fastparquet version to 0.4.0 to avoid AttributeError from numba (:issue:`38344`)
Bumped minimum pymysql version to 0.8.1 to avoid test failures (:issue:`38344`)

.. contributors:: v1.2.0..v1.2.1|HEAD