===================================== PyPy: Python in Python Implementation ===================================== Welcome to PyPy! PyPy is both an implementation of the Python programming language, and an extensive compiler framework for dynamic language implementations. You can build self-contained Python implementations which execute independently from CPython. The home page is: http://pypy.org/ If you want to help developing PyPy, this document might help you: http://doc.pypy.org/ It will also point you to the rest of the documentation which is generated from files in the pypy/doc directory within the source repositories. Enjoy and send us feedback! the pypy-dev team <pypy-dev@python.org> Building ======== First switch to or download the correct branch. The basic choices are ``default`` for Python 2.7 and, for Python 3.X, the corresponding py3.X branch (e.g. ``py3.5``). Build with: .. code-block:: console $ rpython/bin/rpython -Ojit pypy/goal/targetpypystandalone.py This ends up with a ``pypy-c`` or ``pypy3-c`` binary in the main pypy directory. We suggest to use virtualenv with the resulting pypy-c/pypy3-c as the interpreter; you can find more details about various installation schemes here: http://doc.pypy.org/en/latest/install.html