oftenyou'll come to point where your code will workbut you'll recognize that you could improve the code by breaking it up into series of functions that have specific jobs this process is called refactoring refactoring makes your code cleanereasier to understandand easier to extend we can refactor remember_me py by moving the bulk of its logic into one or more functions the focus of remember_me py is on greeting the userso let' move all of our existing code into function called greet_user()remember_ me py import json def greet_user()"""greet the user by name ""filename 'username jsontrywith open(filenameas f_objusername json load(f_objexcept filenotfounderrorusername input("what is your name"with open(filename' 'as f_objjson dump(usernamef_objprint("we'll remember you when you come backusername "!"elseprint("welcome backusername "!"greet_user(because we're using function nowwe update the comments with docstring that reflects how the program currently works this file is little cleanerbut the function greet_user(is doing more than just greeting the user--it' also retrieving stored username if one exists and prompting for new username if one doesn' exist let' refactor greet_user(so it' not doing so many different tasks we'll start by moving the code for retrieving stored username to separate functionimport json def get_stored_username()"""get stored username if available ""filename 'username jsontrywith open(filenameas f_objusername json load(f_objexcept filenotfounderrorv return none elsereturn username