..availability::Windows.

..note::

Changing the filesystem encoding after Python startup is risky because

the old fsencoding or paths encoded by the old fsencoding may be cached

somewhere. Use:envvar:`PYTHONLEGACYWINDOWSFSENCODING` instead.

..versionadded::3.6

See:pep:`529` for more details.

..deprecated-removed::3.13 3.16

Use:envvar:`PYTHONLEGACYWINDOWSFSENCODING` instead.

..data::stdin

stdout

stderr

security and functionality bugs. This includes removal of the ``--cgi``

flag to the ``python -m http.server`` command line in 3.15.

*:mod:`sys`::func:`sys._enablelegacywindowsfsencoding` function.

Replace it with:envvar:`PYTHONLEGACYWINDOWSFSENCODING` environment variable.

(Contributed by Inada Naoki in:gh:`73427`.)

*:mod:`traceback`:

* The field *exc_type* of:class:`traceback.TracebackException` is

Deprecate:func:`sys._enablelegacywindowsfsencoding`. Use

:envvar:`PYTHONLEGACYWINDOWSFSENCODING` instead. Patch by Inada Naoki.

sys__enablelegacywindowsfsencoding_impl(PyObject*module)

{

if (PyErr_WarnEx(PyExc_DeprecationWarning,

"instead.",1))

{

returnNULL;

}

if (_PyUnicode_EnableLegacyWindowsFSEncoding()<0) {

returnNULL;

}