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Develop a GPS-aware application for the Nokia N810, Part 2

Jan 24, 2009, 06:01 (0 Talkback[s])
(Other stories by Paul Ferrill)

"Python is inherently an object-oriented language, because everything in Python is an object. The syntax and structure of the language make it easy to create small, easy-to-understand functions to build upon. Designing an application starts with the list of requirements and uses some type of functional decomposition to determine what code you will need to write to fulfill them.

"For this application, a top-level requirement is the ability to enter and save waypoint information. To fulfill this requirement, you must have some UI elements, such as a text box, a Save button, and a way to save the information for retrieval later, which implies some type of database. Identifying the need for a database drives other code functionality, such as initializing the database the first time the application is run and, in turn, saving and retrieving information from the database.

"Coding a function to create an empty database is a good example of a small, single-function routine. For this project, the code looks like Listing 1"

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