Thanks! Looking forward to trying this.

I'm not sure where these descriptions come from, or whether they're carried over from b2 to b3 etc, but one small note on this bullet point:

* PEP 471, os.scandir(), a faster alternative to os.walk()

This isn't quite correct. os.scandir() is actually an alternative to os.listdir(), which is also used to speed up os.walk().


On Sun, Jul 5, 2015 at 1:20 PM, Larry Hastings <> wrote:

On behalf of the Python development community and the Python 3.5 release team, I'm relieved to announce the availability of Python 3.5.0b3.

Python 3.5 has now entered "feature freeze".  By default new features may no longer be added to Python 3.5.

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

An important reminder for Windows users about Python 3.5.0b3: 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.

You can find Python 3.5.0b2 here:
Happy hacking,


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