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-rw-r--r--Doc/using/cmdline.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 87af7e8..e11fe31 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -429,6 +429,9 @@ Miscellaneous options
not be more verbose than the default if the code is correct: new warnings
are only emitted when an issue is detected. Effect of the developer mode:
+ * Check *encoding* and *errors* arguments on string encoding and decoding
+ operations. Examples: :func:`open`, :meth:`str.encode` and
+ :meth:`bytes.decode`.
* Add ``default`` warning filter, as :option:`-W` ``default``.
* Install debug hooks on memory allocators: see the
:c:func:`PyMem_SetupDebugHooks` C function.
@@ -469,6 +472,10 @@ Miscellaneous options
The ``-X pycache_prefix`` option. The ``-X dev`` option now logs
``close()`` exceptions in :class:`io.IOBase` destructor.
+ .. versionchanged:: 3.9
+ Using ``-X dev`` option, check *encoding* and *errors* arguments on
+ string encoding and decoding operations.
+
Options you shouldn't use
~~~~~~~~~~~~~~~~~~~~~~~~~