Following PR updates Python sources to use new shiny syntax for properties. It replaces the old code

    def _foo(self):
        ...

    def _set_foo(self, value):
        ...

    foo = property(_foo, _set_foo)

with the new code

    @property
    def foo(self):
        ...

    @foo.setter
    def foo(self, value):
        ...

New syntax was added in Python 2.4.

Have you made sure nothing calls the replaced functions manually?

Such as:

    ...
    self._set_foo(9)
    ...

I replaced only private getters and setters. All tests passed.

I have checked and none from replaced function is used. But just for the case I reverted changes for Lib/xml/dom/. Here used more complex logic for generating other properties.

New changeset bdf6b910f9ea75609caee498a975af03b6d23f67 by Serhiy Storchaka in branch 'master':
bpo-29776: Use decorator syntax for properties. (#585)
https://github.com/python/cpython/commit/bdf6b910f9ea75609caee498a975af03b6d23f67