Reading and writing files with Python: 
Some data is meant to be temporary, stored in RAM while an application is running, and then forgotten. Some data, however, is meant to be persistent. It’s stored on a hard drive for later use, and it’s often the stuff that a user cares about the most. For programmers, it’s very common to write code to read and write files, but every language handles this task a little differently. This article demonstrates how to handle data files with Python.
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