Bob is a suite of implementations of the Scheme language in Python. It currently includes:

• A Scheme interpreter
• An implementation of a stack-based virtual machine called the "Bob VM"
• A compiler from Scheme to Bob VM bytecode
• A serializer and deserializer for Bob VM bytecode

In addition, Bob comes with another version of the VM, implemented in C++. It's called "BareVM". BareVM is an optional component - Bob is fully usable as an implementation of Scheme in pure Python.

There's some documentation in the doc/ directory in the source. Getting Started.

The following diagram describes Bob: