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-rw-r--r--Doc/using/cmdline.rst9
1 files changed, 6 insertions, 3 deletions
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 908a17c..e8a329e 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -538,13 +538,16 @@ conflict.
.. envvar:: PYTHONIOENCODING
If this is set before running the interpreter, it overrides the encoding used
- for stdin/stdout/stderr, in the syntax ``encodingname:errorhandler``. The
- ``:errorhandler`` part is optional and has the same meaning as in
- :func:`str.encode`.
+ for stdin/stdout/stderr, in the syntax ``encodingname:errorhandler``. Both
+ the ``encodingname`` and the ``:errorhandler`` parts are optional and have
+ the same meaning as in :func:`str.encode`.
For stderr, the ``:errorhandler`` part is ignored; the handler will always be
``'backslashreplace'``.
+ .. versionchanged:: 3.4
+ The ``encodingname`` part is now optional.
+
.. envvar:: PYTHONNOUSERSITE