The official release notes for the following release is certainly a clear official statement. https://www.python.org/downloads/release/python-370/ https://www.

The official release notes for the following release is certainly a clear official statement. https://www.python.org/downloads/release/python-370/ https://www.python.org/downloads/release/python-370/ “The insertion-order preservation nature of dict objects is now an official part of the Python language spec.” (June 27, 2018)