Object references that support stable comparison and hashes.
Documentation can be found at https://zopekeyreference.readthedocs.io
Remove __cmp__ methods. Since the implementation of the rich comparison methods (__eq__, etc) in 4.0a1, the interpreter won’t call __cmp__, even on Python 2. See issue 10.
Add support for Python 3.8, 3.9, and 3.10.
Drop support for Python 3.4.
Add support for Python 3.5, 3.6, and 3.7.
Drop support for Python 2.6 and 3.3.
Add support for PyPy (PyPy3 blocked on PyPy3-compatible zodbpickle).
Add support for Python 3.4.
Add support for testing on Travis.
Ensure that the SimpleKeyReference implementation (used for testing) also implements rich comparison properly.
Add support for Python 3.3.
Replace deprecated zope.component.adapts usage with equivalent zope.component.adapter decorator.
Replace deprecated zope.interface.implements usage with equivalent zope.interface.implementer decorator.
Drop support for Python 2.4 and 2.5.
Fix tests broken by removal of zope.testing from test dependencies: avoid the ZODB3 module that needs it.
Prefer the standard libraries doctest module to the one from zope.testing.
Make the tests pass with ZODB3.9, which changed the repr() of the persistent classes.
Load keyreferences, pickled by old zope.app.keyreference even if its not installed anymore (so don’t break if one updates a project that don’t directly depends on zope.app.keyreference).
Rename zope.app.keyreference to zope.keyreference.
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