# PyPy 5.7.1

We have released a bugfix PyPy2.7-v5.7.1 and PyPy3.5-v5.7.1 beta (Linux 64bit), due to the following issues:

> - correctly handle an edge case in dict.pop (issue 2508)

> - fix a regression to correctly handle multiple inheritance in a C-API type where the second base is an app-level class with a `__new__` function

> - fix a regression to fill a C-API type's `tp_getattr` slot from a `__getattr__` method (issue 2523)

Thanks to those who reported the issues.

## What is PyPy?

PyPy is a very compliant Python interpreter, almost a drop-in replacement for CPython 2.7 and CPython 3.5. It's fast (PyPy and CPython 2.7.x performance comparison) due to its integrated tracing JIT compiler.

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

The PyPy 2.7 release supports:

> - x86 machines on most common operating systems (Linux 32/64 bits, Mac OS X 64 bits, Windows 32 bits, 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 update, and continue to help us make PyPy better.

Cheers

The PyPy Team