Is it possible to create a three address code IR from tree.rootNode?

[genderev]

I've been attempting to use tree-sitter-python as the parser for a Python interpreter but I'm not sure whether I am attempting something that is impossible.

Is there a recommended way to incrementally go through each node of the parse tree?
I'm also very confused about how queries work. I want to be able to write a query that says - somehow - return the right and left hand sides of an expression_statement or call, but I'm not sure how.