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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Wed, 13 Jul 2011 09:18:59 -0600
Subject: Re: What is the difference between PyPy and Python? are there lot of differences?
To: Anthony Kong <anthony.hw.kong@gmail.com>
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On Wed, Jul 13, 2011 at 8:19 AM, Anthony Kong <anthony.hw.kong@gmail.com> wrote:
> One of the main difference is that pypy supports only R-Python, which stands
> for 'Restricted Python".
> It is a subset of C-python language.

This is wrong.  The PyPy *interpreter* is written in RPython.  At the
application level, PyPy supports the full syntax and semantics of
Python (with a few minor differences of the same sort that you find in
Jython or IronPython).