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Hello, dear friends.



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So in this lesson, we're going to try to understand what module's mean and what's the logic in this



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regard.



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OK, so let's start.



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What are modules, anyway?



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Well, just simply put, a module is a file consisting of python code, a module can define functions,



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classes and variables.



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Module can also include runnable code.



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So why do we need to use it?



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I think you can guess it a couple of things, but I want to tell you that by integrating a Python module



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into our program, we can use it from functions and classes written inside the modules and then write



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our programs way more effectively.



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So without the concept of a module, we would have to write each function and class in our programs



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ourselves.



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So how do we use it?



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Yes, the 20000 coin question.



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So the import statement that's going to allow us to use any python source file as a module in another



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python source file, you see where we're going with this.



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When the interpreter encounters an import statement, it imports the module.



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If the module is present in the search path and a search path is a list of directories that the interpreter



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searches for before importing a module.



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OK, I get it, I get it, but how many times do we need to call up a module?



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Well, a module is only loaded once, regardless of the number of times that it is imported.



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So this prevents the module execution from happening over and over again if multiple imports occur.



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Now, what about ready made modules in the Python library?



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Aha.



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Now we're getting to it by then has a number of Ready-Made modules written by Python developers.



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It's also in our code.



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We can use many modules that programmers upload to the Internet and GitHub, and we can write well,



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just more beautiful programs in a much more time efficient manner.



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You want to see some examples.



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I know you do.



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So let's import one readymade module in Python called the math module for this import math, and we



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import the math module into our project.



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We can use all the math functions now.



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So now we can see the inside of the math module with the dirt method.



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And let's have a look and see what's inside that math module.



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Math.



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And now we can see all the math functions.



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So as you can see, there are way too many functions in it.



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Also, if you want to know what they do, we can type help math.



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Now we can see all the math functions and their tasks.



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Also, we can see each function and its task individually.



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So that's what we need to do.



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Just type help map function name like factorial.



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Now, pythons from statement letters import specific attributes from a module into the current namespace.



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But first, we need to reset the kernel.



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Is it going to lose previous import function?



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And let's check and see if the colonel has been reset.



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And it has.



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So now time for -- math, import a module name like floor.



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And yeah, let's use the floor function.



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Eight dot seven.



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The result is eight.



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Also, if you want to know what they do, we can type help math.



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Floor.



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We get an error because we didn't imported.



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Help.



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Floor.



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So what if we try a different function, SEAL eight point seven?



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Cool, so play around with that, because in this lesson, we learned the module's concept in Python



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and a few different ways to use it.



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Play around with it and I'll see you in the next lesson.



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Have a good day.