The goal of this thesis is to implement a compiler for a small subset of the Python programming language, with at least basic control flow (if, while, for), integer arithmetic, top-level functions and the assert statement. The preferred implementation language is (regular) Python and QBE is the preferred middle-end and code generator, though other options may be considered and evaluated by the student. The resulting implementation should be able to compile programs from the first two chapters of the IB111 workbook. Support for additional types (lists, floats, dictionaries, etc.) is optional.