Improve the porting section
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This article explains the new features in Python 3.3, compared to 3.2.
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This article explains the new features in Python 3.3, compared to 3.2.
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.. _pep-393:
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PEP 393: Flexible String Representation
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PEP 393: Flexible String Representation
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=======================================
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=======================================
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@ -540,7 +542,10 @@ Porting to Python 3.3
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=====================
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=====================
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This section lists previously described changes and other bugfixes
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This section lists previously described changes and other bugfixes
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that may require changes to your code:
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that may require changes to your code.
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Porting Python code
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-------------------
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* Issue #12326: On Linux, sys.platform doesn't contain the major version
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* Issue #12326: On Linux, sys.platform doesn't contain the major version
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anymore. It is now always 'linux', instead of 'linux2' or 'linux3' depending
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anymore. It is now always 'linux', instead of 'linux2' or 'linux3' depending
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@ -548,6 +553,24 @@ that may require changes to your code:
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with sys.platform.startswith('linux'), or directly sys.platform == 'linux' if
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with sys.platform.startswith('linux'), or directly sys.platform == 'linux' if
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you don't need to support older Python versions.
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you don't need to support older Python versions.
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Porting C code
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--------------
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* Due to :ref:`PEP 393 <pep-393>`, the :c:type:`Py_UNICODE` type and all
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functions using this type are deprecated (but will stay available for
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at least five years). If you were using low-level Unicode APIs to
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construct and access unicode objects and you want to benefit of the
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memory footprint reduction provided by the PEP 393, you have to convert
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your code to the new :doc:`Unicode API <../c-api/unicode>`.
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However, if you only have been using high-level functions such as
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:c:func:`PyUnicode_Concat()`, :c:func:`PyUnicode_Join` or
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:c:func:`PyUnicode_FromFormat()`, your code will automatically take
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advantage of the new unicode representations.
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Other issues
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------------
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.. Issue #11591: When :program:`python` was started with :option:`-S`,
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.. Issue #11591: When :program:`python` was started with :option:`-S`,
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``import site`` will not add site-specific paths to the module search
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``import site`` will not add site-specific paths to the module search
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paths. In previous versions, it did. See changeset for doc changes in
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paths. In previous versions, it did. See changeset for doc changes in
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removed. Code checking sys.flags.division_warning will need updating.
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removed. Code checking sys.flags.division_warning will need updating.
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Contributed by Éric Araujo.
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Contributed by Éric Araujo.
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* :pep:`393`: The :c:type:`Py_UNICODE` type and all functions using this type
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are deprecated. To fully benefit of the memory footprint reduction provided
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by the PEP 393, you have to convert your code to the new Unicode API. Read
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the porting guide: XXX.
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