On behalf of the Python development community and the Python 3.5 release
team, I'm pleased to announce the availability of Python 3.5.0b1.
Python 3.5 has now entered "feature freeze". By default new features may
no longer be added to Python 3.5. (However, there are a handful of
features that weren't quite ready for Python 3.5.0 beta 1; these were
granted exceptions to the freeze, and are scheduled to be added before
This is a preview release, and its use is not recommended for production
Three important notes for Windows users about Python 3.5.0b1:
- If you have previously installed Python 3.5.0a1, you may need to
manually uninstall it before installing Python 3.5.0b1 (issue23612).
- If installing Python 3.5.0b1 as a non-privileged user, you may need
to escalate to administrator privileges to install an update to your
C runtime libraries.
- There is now a third type of Windows build for Python 3.5. In
addition to the conventional installer and the web-based installer,
Python 3.5 now has an embeddable release designed to be deployed as
part of a larger application's installer for apps using or extending
Python. During the 3.5 alpha releases, this was an executable
installer; as of 3.5.0 beta 1 the embeddable build of Python is now
shipped in a zip file.
You can find Python 3.5.0b1 here: