November 2018
Beginner
304 pages
7h 35m
English
Content preview from Learn Programming in Python with Cody Jackson
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Files and Databases
The final built-in object type of Python allows us to access files. Files in Python are different from the previous types I've covered. They aren't numbers, sequences, or mappings; they only export methods for common file processing. Technically, the file is a pre-built C extension that provides a wrapper for the C stdio.h (standard input/output) library header. If you already know how to use files in other languages, there isn't much difference in Python.
Files are a way to save data permanently. Apart from a few program listings, nearly everything demonstrated so far is resident only in memory; as soon as you close down Python or turn off your computer, it goes away. You would have to retype everything over if you wanted ...
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