[pypy-dev] PyPy GSoC Application: Supporting Python 2.5 features in PyPy

Bruno Gola brunogola at gmail.com
Sat Mar 29 04:33:09 CET 2008

ta ai

On Sat, Mar 29, 2008 at 12:30 AM, Bruno Gola <brunogola at gmail.com> wrote:
> Hi,
>  I'm a under-grad student (3th year) from "Centro Universitário SENAC"
>  from São Palo, Brazil. I'm very interested in the PyPy project and
>  since last year I have been planning to get involved. Well, this plans
>  has transformed into my graduation project that I'll start working
>  next semester. My graduation project idea is to study two different
>  implementations (CPython (C/Static/lower-level) and Pypy
>  (Python/Dynamic/higher-level)) of a programming language (Python) and
>  compare the difficult to hack both. I intend to study both and suggest
>  optimizations to the implementations and show that it is easier to
>  modify the higher-level implementation.
>  Well, I told you this because my GSoC application is all about the
>  Pypy interpreter (or the Pypy implementation of Python ) ;).
>  I wrote some ideas to the project, so I ask if anyone could review it.
>  Support new features of Python 2.5 in PyPy
>  ==========================================
>  * Motivation and goal
>         Pypy's interpreter currently supports some of the "new" Python
>  features introduced in Python 2.5. Also, the Python 2.5 changes to
>  standard library have not been ported yet.
>         This proposal goal is to bring 2.5 features and changes to Pypy interpreter.
>  * Features
>         Some features are already supported (for example __index__). I'm
>  proposing to make Pypy support all the remaining features from 2.5.
>         There are changes made to the python standard library[1] that haven't
>  been ported yet because of the lack of 2.5 features, so I'm proposing
>  to port this changes (some major modules added are sqlite3, ctypes and
>  ElementTree) too.
>         So, what I'm proposing:
>                 * Support all Python 2.5 features
>                 * "Sync" PyPy's standard library with CPython
>  [1] http://docs.python.org/whatsnew/modules.html
>  * Coding
>         I started looking into the list of what is new in Python 2.5 to see
>  if any new feature would need a special attention. My plans are to
>  start coding the changes to the language (not to the stdlib) because I
>  think it doesn't make much sense to implement the stdlib without full
>  language support and it seems that porting the stdlib will not be much
>  trouble (not as much as supporting some features :-)).
>         I intend to start coding some simple feature (like PEP-342 that seems
>  easy to support) so I can study the PyPy interpreter better. Then I'll
>  code the other features (PEPs 314[is this really needed in Pypy?]],
>  328, 342, 343[or what is missing] and 352). [am I missing any other
>  feature?].
>         With all features supported (and tested :-)) I'll code the stdlib
>  changes. At this point I think I'll be familiar with the interpreter
>  code so I pretend to port first the sqlite3 module.
>         I like follow TDD (Test-driven development) so tests will not be a
>  problem (I mean, it will be part of the final code, of course :)).
>  Thanks,
>  --
>  Bruno Fialho Marques Gola <brunogola at gmail.com>
>  bgola` @ irc.freenode.org
>  http://www.brunogola.com.br
>  Cel: (11) 9294-5883

Bruno Fialho Marques Gola <brunogola at gmail.com>
Cel: (11) 9294-5883

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