persistent 4.1.0

Translucent persistent objects

persistent: automatic persistence for Python objects

This package contains a generic persistence implementation for Python. It forms the core protocol for making objects interact “transparently” with a database such as the ZODB.

Please see the Sphinx documentation (docs/index.rst) for further information.

Note

Use of this standalone persistent release is not recommended or supported with ZODB < 3.11. ZODB 3.10 and earlier bundle their own version of the persistent package.

persistent Changelog

4.1.0 (2015-05-19)

• Made the Python implementation of Persistent and PickleCache behave more similarly to the C implementation. In particular, the Python version can now run the complete ZODB and ZEO test suites.

• Fix the hashcode of the Python TimeStamp on 32-bit platforms.

4.0.9 (2015-04-08)

• Make the C and Python TimeStamp objects behave more alike. The Python version now produces the same repr and .raw() output as the C version, and has the same hashcode. In addition, the Python version is now supports ordering and equality like the C version.

• Intern keys of object state in __setstate__ to reduce memory usage when unpickling multiple objects with the same attributes.

• Add support for PyPy3.

• 100% branch coverage.

4.0.8 (2014-03-20)

• Add support for Python 3.4.

• In pure-Python Persistent, avoid loading state in _p_activate for non-ghost objects (which could corrupt their state). (PR #9)

• In pure-Python, and don’t throw POSKeyError if _p_activate is called on an object that has never been committed. (PR #9)

• In pure-Python Persistent, avoid calling a subclass’s __setattr__ at instance creation time. (PR #8)

• Make it possible to delete _p_jar / _p_oid of a pure-Python Persistent object which has been removed from the jar’s cache (fixes aborting a ZODB Connection that has added objects). (PR #7)

4.0.7 (2014-02-20)

• Avoid a KeyError from _p_accessed() on newly-created objects under pure-Python: these objects may be assigned to a jar, but not yet added to its cache. (PR #6)

• Avoid a failure in Persistent.__setstate__ when the state dict contains exactly two keys. (PR #5)

• Fix a hang in picklecache invalidation if OIDs are manually passed out-of-order. (PR #4)

• Add PURE_PYTHON environment variable support: if set, the C extensions will not be built, imported, or tested.

4.0.6 (2013-01-03)

• Updated Trove classifiers.

4.0.5 (2012-12-14)

• Fixed the C-extensions under Py3k (previously they compiled but were not importable).

4.0.4 (2012-12-11)

• Added support for Python 3.3.

• C extenstions now build under Python 3.2, passing the same tests as the pure-Python reference implementation.

4.0.3 (2012-11-19)

• Fixed: In the C implimentation, an integer was compared with a pointer, with undefined results and a compiler warning.

• Fixed: the Python implementation of the _p_estimated_size propety didn’t support deletion.

• Simplified implementation of the _p_estimated_size property to only accept integers. A TypeError is raised if an incorrect type is provided.

4.0.2 (2012-08-27)

• Correct initialization functions in renamed _timestamp extension.

4.0.1 (2012-08-26)

• Worked around test failure due to overflow to long on 32-bit systems.

• Renamed TimeStamp extension module to avoid clash with pure-Python timestamp module on case-insensitive filesystems.

  N.B: the canonical way to import the TimeStamp class is now:

  from persistent.timestamp import TimeStamp

  which will yield the class from the extension module (if available), falling back to the pure-Python reference implementation.

4.0.0 (2012-08-11)

Platform Changes

• Added explicit support for Python 3.2 and PyPy.

  • Note that the C implementations of Persistent, PickleCache, and Timestamp are not built (yet) on these platforms.

• Dropped support for Python < 2.6.

Testing Changes

• 100% unit test coverage.

• Removed all ZODB-dependent tests:

  • Rewrote some to avoid the dependency

  • Cloned the remainder into new ZODB.tests modules.

• Refactored some doctests refactored as unittests.

• Completed pure-Python reference implementations of ‘Persistent’, ‘PickleCache’, and ‘TimeStamp’.

• All covered platforms tested under tox.

• Added support for continuous integration using tox and jenkins.

• Added setup.py dev alias (installs nose and coverage).

• Dropped dependency on zope.testing / zope.testrunner: tests now run with setup.py test.

Documentation Changes

• Refactored many Doctests as Sphinx documentation (snippets are exercised via ‘tox’).

• Added setup.py docs alias (installs Sphinx and repoze.sphinx.autointerface).