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You have learned about different data

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types that you can use in Python, for

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example, you learned that you can have

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strings, and you can have lists, and

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numbers, and so on, and we stored these

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data types in variables. So a variable

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was associated to a string, for example.

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The problem with this is that you are

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storing data inside your Python program.

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If you want to really, really store in

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data, for example, you want to

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store weather forecasts, you don't want

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to write those forecast

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values in strings, or in numbers, in

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your '.py' script. What you want to do

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instead is you want to have those data

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in external files, for example, text

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files, or CSV files, or later on, you

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will learn about databases, how to store

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data in databases, and get those data

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via Python and process them in Python.

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But in this section, you will learn

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about how to store data in text files

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and how to get data from text files,

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how to create text files with Python,

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how to read the data from text files, and

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process them with Python. So that is a

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very, very crucial concept of

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programming, and so that's an advanced

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concept and you learn that in this

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section. So have fun, and I'll see you in the next video.