PyPy3 v5.2 alpha 1

We’re pleased to announce the first alpha release of PyPy3.3 v5.2. This is the first release of PyPy which targets Python 3.3 (3.3.5) compatibility.

We would like to thank all of the people who donated to the py3k proposal for supporting the work that went into this and future releases.

You can download the PyPy3.3 v5.2 alpha 1 release here:


What is PyPy?

PyPy is a very compliant Python interpreter, almost a drop-in replacement for CPython 2.7.10 and one day 3.3.5. It’s fast due to its integrated tracing JIT compiler.

We also welcome developers of other dynamic languages to see what RPython can do for them.

This release supports:

  • x86 machines on most common operating systems except Windows (Linux 32/64, Mac OS X 64, OpenBSD, FreeBSD),
  • newer ARM hardware (ARMv6 or ARMv7, with VFPv3) running Linux,
  • big- and little-endian variants of PPC64 running Linux,
  • s390x running Linux

Please try it out and let us know what you think. We welcome feedback, we know you are using PyPy, please tell us about it!

We’d especially like to thank these people for their contributions to this release:

Manuel Jacob, Ronan Lamy, Mark Young, Amaury Forgeot d’Arc, Philip Jenvey, Martin Matusiak, Vasily Kuznetsov, Matti Picus, Armin Rigo and many others.


The PyPy Team