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Merge from 3.2: clarify universal-newline wording in tutorial (issue #16266).

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Chris Jerdonek 2012-10-17 20:21:05 -07:00
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Doc/tutorial/inputoutput.rst
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@ -256,9 +256,10 @@ default being UTF-8). ``'b'`` appended to the mode opens the file in
:dfn:`binary mode`: now the data is read and written in the form of bytes :dfn:`binary mode`: now the data is read and written in the form of bytes
objects. This mode should be used for all files that don't contain text. objects. This mode should be used for all files that don't contain text.
In text mode, the default is to convert platform-specific line endings (``\n`` In text mode, the default when reading is to convert platform-specific line
on Unix, ``\r\n`` on Windows) to just ``\n`` on reading and ``\n`` back to endings (``\n`` on Unix, ``\r\n`` on Windows) to just ``\n``. When writing in
platform-specific line endings on writing. This behind-the-scenes modification text mode, the default is to convert occurrences of ``\n`` back to
platform-specific line endings. This behind-the-scenes modification
to file data is fine for text files, but will corrupt binary data like that in to file data is fine for text files, but will corrupt binary data like that in
:file:`JPEG` or :file:`EXE` files. Be very careful to use binary mode when :file:`JPEG` or :file:`EXE` files. Be very careful to use binary mode when
reading and writing such files. reading and writing such files.