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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,

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and it uses the sayHello name,

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and it returns a 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,

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which is the name of the module,

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dot sayHello,

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and for instance,

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which is the name 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 that contains modules

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and an __init__.py file.

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Functions from the modules in a package can be imported in code

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using from package dot module one import my function.

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And using packages makes it easier to implement standardization.

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Packages are also one of the reasons behind the success of Python,

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because it is what makes Python easily extensible.