[Python-Dev] [RELEASED] Python 3.5.0b2 is now available

Larry Hastings larry at hastings.org
Mon Jun 1 06:37:59 CEST 2015

On behalf of the Python development community and the Python 3.5 release 
team, I'm relieved to announce the availability of Python 3.5.0b2.  
Python 3.5.0b1 had a major regression (see 
http://bugs.python.org/issue24285 for more information) and as such was 
not suitable for testing Python 3.5. Therefore we've made this extra 
beta release, only a week later.  Anyone trying Python 3.5.0b1 should 
switch immediately to testing with Python 3.5.0b2.

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 2; these were 
granted exceptions to the freeze, and are scheduled to be added before 
beta 3.)

This is a preview release, and its use is not recommended for production 

Three important notes for Windows users about Python 3.5.0b2:

  * If installing Python 3.5.0b2 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 3.5.0b2 here:


Happy hacking,

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