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In this video, you'll learn about modules and packages.

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A module is a file that contains code.

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So here we see a module with the name greeting.py.

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It defines a function sayHello, and it uses the sayHello name.

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And it returns hello followed by a name,

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where the name is a variable that will be used.

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And you can use it in another file,

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as in import greeting, which will import the module.

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And then you use print greeting, which

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is the name of the module, dot sayHello.

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Anna, for instance, which is the name

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that you want to print then.

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Now we have a package.

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A package is a complete directory

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that contains modules and an __init__.py file.

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Functions from the modules in a package

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can be imported in code using from package.module one

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import my function.

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And using packages makes it easier

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to implement standardization.

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Packages are also one of the reasons

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behind the success of Python, because it is what

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makes Python easily extensible.