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**Objectives**

Building a complete Python interpreter written in Python,
using a subset of Python that avoids dynamic features
which would impair the objectives of WP05_ (RPython).

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**Description of work**

**Task 1**

Design and implement the PyPy bytecode interpreter and
build an object space library in RPython.
The resulting interpreter must cover the complete Python
language specification.

**Task 2**

Port the built-in Python library to PyPy
(functions, types and modules currently implemented in C).
Decide on a case-by-case basis which features are to
be implemented using RPython or just general Python.

**Task 3**

Implement a Python parser and bytecode compiler in
Python.

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**Deliverables**

- D04.1 First partial Python Implementation running on top of CPython
- D04.2 Complete Python implementation running on top of CPython

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**Milestones and Expected Result**

- M1 A partial Python implementation that passses 75% of the official
  Python test suite that don't depend on extension modules.

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