aspects of the running example used in this -the characters here are similar in spirit to those in the oop tutorial in that bookand the later class-based examples here are essentially variation on theme despite some redundancyi' revisiting the example here for three reasonsit serves its purpose as review of language fundamentalssome readers of this book haven' read learning pythonand the example receives expanded treatment herewith the addition of gui and web interfaces that isthis picks up where learning python left offpushing this core language example into the realm of realistic applications--whichin nutshellreflects the purpose of this book the task imagineif you willthat you need to keep track of information about people for some reason maybe you want to store an address book on your computeror perhaps you need to keep track of employees in small business for whatever reasonyou want to write program that keeps track of details about these people in other wordsyou want to keep records in database--to permanently store lists of people' attributes on your computer naturallythere are off-the-shelf programs for managing databases like these by writing program for this task yourselfhoweveryou'll have complete control over its operation you can add code for special cases and behaviors that precoded software may not have anticipated you won' have to install and learn to use yet another database product and you won' be at the mercy of software vendor to fix bugs or add new features you decide to write python program to manage your people step representing records if we're going to store records in databasethe first step is probably deciding what those records will look like there are variety of ways to represent information about people in the python language built-in object types such as lists and dictionaries are often sufficientespecially if we don' initially care about processing the data we store using lists listsfor examplecan collect attributes about people in positionally ordered way start up your python interactive interpreter and type the following two statementsbob ['bob smith' 'software'sue ['sue jones' 'hardware' sneak preview