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gh-127305: more detailed doc for register_error's error_handler #139554

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gh-127305: more detailed doc for register_error's error_handler #139554

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gh-127305: more detailed doc for `register_error`'s error_handler
litlighilit Oct 4, 2025
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fixup! gh-127305: more detailed doc for `register_error`'s error_handler
litlighilit Oct 4, 2025
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6 changes: 4 additions & 2 deletions Doc/library/codecs.rst
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Expand Up @@ -462,8 +462,10 @@ handler:
where encoding should continue. The replacement may be either :class:`str` or
:class:`bytes`. If the replacement is bytes, the encoder will simply copy
them into the output buffer. If the replacement is a string, the encoder will
encode the replacement. Encoding continues on original input at the
specified position. Negative position values will be treated as being
encode the replacement with the ``'strict'`` error handling, which means
:exc:`UnicodeEncodeError` may be raised here.
Encoding continues on original input at the specified position.
Negative position values will be treated as being
relative to the end of the input string. If the resulting position is out of
bound an :exc:`IndexError` will be raised.

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