Tabla de Contenidos: “…; Using the Python interactive shell to understand the code; Writing a characterization test; Using pdb to understand the code; Some common pdb commands; Walking through a pdb session; Techniques to break dependencies; The Rope refactoring library; Separate initialization from execution; Use default values for parameters; Extract the method and test; Inject dependencies; Inherit and test; Stubbing local methods; Extract the method and stub; The cycle continues; Time to refactor; Long-term refactoring; Summary…”