TITLE OF PAPER: From Python to PLT Scheme
URL OF PRESENTATION: _URL_of_powerpoint_presentation_
PRESENTED BY: Daniel Silva
REPRESENTING: Northeastern University

CONFERENCE: PyCON 2004
DATE: 20040324
LOCATION: _venue_and_room_in_venue_

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REAL-TIME NOTES / ANNOTATIONS OF THE PAPER:
{If you've contributed, add your name, e-mail & URL at the bottom}

Motivation
    Use DrScheme tools on Python
    Python is popular
    Python should map easily onto Scheme
        Python has features from functional programming languages
    Multiple implementations are good for languages
    Want DrScheme+Python

DrScheme
    IDE for Scheme
        Shows binding information graphically
        Syntax coloring
        Test code coverage
        Test case integration with source code
        Profiler w/ color-coded output
        MrFlow - control/data flow analysis
    Scheme dialect with
        Namespaces
        Hash tables
    Easy to create cross language dev tools
        Simple tool (plugin) interface)


Plugins to DrScheme allow you to add languages
    Java (ProfessorJ)
    ML - (Dromedary)
    Perl - ... no
    Python to MzScheme compiler - Spy
        also provides a (small) runtime system

Code Generation
    Functions
        PyCode - C object stores Scheme procedures
        PyFunction
        return statement --> Scheme escapes
        Application via PyApply
    Classes
        All objects have an associated dictionary
        Inheritance information stored in dict(__bases__)
        All attributes stored in dictionary
        Moving to a CPython-style representation
    Modules
        MzScheme modules
            No cycles
            Statically loaded at top level
            No intermodule assignment
        translated as mzScheme namespaces
    Example for generating syntax objects - while loop
    
Runtime System (small)
    Keep size minimal
    Hooks into C runtime.
    Foreign Function Interface (FFI) allows Scheme to call Python
    Using Scheme objects and Python objects (nearly) interchangeably by defining Scheme's python-node in the right way.

Status
    Focused on the runtime system now
        Porting system calls to CPython's standard modules

Show DrScheme tools working on Python code.
    Works
        Code coverage
        Binding information
    Should work
        Test suite
        Profiler
    Doesn't work
        Mr. Flow - lack of type information
        
Future work
    Complete FFi
    Optimization
        Tail call translation
        Constant folding
        Common Subexpression Elimination
        Peephole optimizations
    Call Scheme from Python
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REFERENCES: {as documents / sites are referenced add them below}

Paper: http://www.python.org/pycon/dc2004/papers/25/spy-pycon2004-paper-html/spy-pycon2004-paper.html
Spy: http://spyweb.hopto.org/
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QUOTES:


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CONTRIBUTORS: {add your name, e-mail address and URL below}
Ted Leung, twl@osafoundation.org, http://www.sauria.com/blog
Abhay Saxena, ark3@email.com

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