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Diffstat (limited to 'Doc/library/io.rst')
| -rw-r--r-- | Doc/library/io.rst | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/Doc/library/io.rst b/Doc/library/io.rst index b302c64..8e6e601 100644 --- a/Doc/library/io.rst +++ b/Doc/library/io.rst @@ -757,13 +757,17 @@ Text I/O sequences) can be used. Any other error handling name that has been registered with :func:`codecs.register_error` is also valid. + .. index:: + single: universal newlines; io.TextIOWrapper class + *newline* controls how line endings are handled. It can be ``None``, ``''``, ``'\n'``, ``'\r'``, and ``'\r\n'``. It works as follows: - * When reading input from the stream, if *newline* is ``None``, universal - newlines mode is enabled. Lines in the input can end in ``'\n'``, + * When reading input from the stream, if *newline* is ``None``, + :term:`universal newlines` mode is enabled. Lines in the input can end + in ``'\n'``, ``'\r'``, or ``'\r\n'``, and these are translated into ``'\n'`` before - being returned to the caller. If it is ``''``, universal newline mode is + being returned to the caller. If it is ``''``, universal newlines mode is enabled, but line endings are returned to the caller untranslated. If it has any of the other legal values, input lines are only terminated by the given string, and the line ending is returned to the caller untranslated. @@ -819,10 +823,13 @@ Text I/O output.close() +.. index:: + single: universal newlines; io.IncrementalNewlineDecoder class + .. class:: IncrementalNewlineDecoder - A helper codec that decodes newlines for universal newlines mode. It - inherits :class:`codecs.IncrementalDecoder`. + A helper codec that decodes newlines for :term:`universal newlines` mode. + It inherits :class:`codecs.IncrementalDecoder`. Performance |