This basic python vm written in Python implements basic arithmetic operations and function call. These are just a small subset of operations that the actual CPython implements. The input to this VM is Python bytecode.
By executing a series of stack operations this tiny VM executes the bytecode and produces
the intended result. Just like the official implementation in C, the operations are decided
by a switch on OPCODEs found in the bytecode. Because of the absence of the switch in
Python, I have used a very helpful OPMAP (operations) dictionary to do the job.
The stack operations are roughly as follows:
1. Push OPERANDS to stack.
2. When OPCODE is encountered, POP the corresponding number of OPERANDS.
3. Do the associated operation.
4. Push the result back.
This project originally was here:
https://github.com/cshintov/python/tree/master/projects/python_vm