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Benjamin Peterson 2015-05-26 21:40:28 -05:00
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Doc/whatsnew/3.5.rst
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@ -253,13 +253,13 @@ PEP 488: Elimination of PYO files
---------------------------------
:pep:`488` does away with the concept of ``.pyo`` files. This means that
``.pyc`` files represent both unoptimized and optimized bytecode. To prevent
the need to constantly regenerate bytecode files, ``.pyc`` files now have an
optional ``opt-`` tag in their name when the bytecode is optimized. This has
the side-effect of no more bytecode file name clashes when running under either
``-O`` or ``-OO``, thus allowing unoptimized, ``-O``, and ``-OO`` bytecode files
to all exist simultaneously. :func:`importlib.util.cache_from_source` has an
updated API to help with this change.
``.pyc`` files represent both unoptimized and optimized bytecode. To prevent the
need to constantly regenerate bytecode files, ``.pyc`` files now have an
optional ``opt-`` tag in their name when the bytecode is optimized. This has the
side-effect of no more bytecode file name clashes when running under either
``-O`` or ``-OO``. Consequently, bytecode files generated from ``-O``, and
``-OO`` may now exist simultaneously. :func:`importlib.util.cache_from_source`
has an updated API to help with this change.
.. seealso::