Hi,

This issue serves as an umbrella issue for several related issues, one of them being #7077.

Python 3 introduces changes to syntax and inner workings of Python. Some of the changes include:

• Unicode strings.
• Use range function.
• _winreg -> winreg.
• threading.Barrier.
• collections.ChainMap.
• Reorganized standard library folder structure.
• Timer-based GIL instead of instruction count.
• Possibilities with asynchronous functions (async/await).
• Virtual environments.
• Built-in compatibility with Windows 10 (Python 3.5 or later).
• Losing Windows XP support (Python 3.5 and later).
• No more .pyo files.

Upgrading to Python 3 will require huge coordination, as NVDA developers, add-on writers, translators, users and others will need to adapt new attitudes, assumptions and so on. In terms of dependencies, the only thing left is SCons (wxPython is discussed in #7077).

Thanks.