# PyPy directory cross-reference

Here is a fully referenced alphabetical two-level deep directory overview of PyPy:

Directory | explanation/links
--- | ---
pypy/bin/ | command-line scripts, mainly pypy/bin/pyinteractive.py
pypy/config/ | handles the numerous options for building and running PyPy
pypy/doc/ | text versions of PyPy developer documentation
pypy/doc/config/ | documentation for the numerous translation options
pypy/doc/discussion/ | drafts of ideas and documentation
pypy/goal/ | our main PyPy-translation scripts live here
pypy/interpreter/ | bytecode interpreter and related objects (frames, functions, modules,...)
pypy/interpreter/pyparser/ | interpreter-level Python source parser
pypy/interpreter/astcompiler/ | interpreter-level bytecode compiler, via an AST representation
pypy/module/ | contains mixed modules implementing core modules with both application and interpreter level code. Not all are finished and working. Use the `--withmod-xxx` or `--allworkingmodules` translation options.
pypy/objspace/ | object space implementations
pypy/objspace/std/ | the StdObjSpace implementing CPython's objects and types
pypy/tool/ | various utilities and hacks used from various places
pypy/tool/pytest/ | support code for our testing methods
`*/test/` | many directories have a test subdirectory containing test modules (see Testing in PyPy)
`_cache/` | holds cache files from various purposes