 Hello and welcome to end-to-end machine learning course 112. Getting ready to learn Python? The Windows Edition. This is for you even if you're brand new to computers in every way. First time fingers on a keyboard. If you have a Windows machine and you want to get to a place where you can write your first line of Python code. This series of videos is meant to step through the absolute bare minimum set of what you need to get there. We start off in this video, video one, looking at files and directories. I'm using Windows 10, so my instructions will be specific to Windows version 10. If you're using an older version of the Windows operating system, almost everything I say will apply and most of the video will apply as well. You'll likely be able to piece it together, but it'll be slightly different. So don't be too worried if it doesn't line up exactly. But if you have Windows 10, hopefully it'll line up directly. To start off, we want to open a program called File Explorer. This lets us look at files and directories. To find it, you can go to the magnifying glass in your bar that has your Windows start icon and some program icons. There should be a magnifying glass for search. You can pull it open and type File Explorer. Once you do, one of the options that come up will be this thing that looks like a Manila file folder and you can double click on it and it will open this program, File Explorer. What you see will probably look a little bit different than what I see here. Somewhere there will be an icon that says Desktop. That's a special folder. Anything that's in it will actually show up on your screen. So in my case, on this black desktop screen, yours will likely have an image on it of some sort. But anything you put in your desktop folder will show up on the screen. There's also a Downloads folder, which is a place that any files that you download from the Internet go. There's a Documents folder, which Windows sets aside as a place to put your stuff. Word documents or presentations, we're going to use it to put Python files. There's also a special folder called Pictures and Videos and Music. Windows creates these for you as well, so you have a convenient place to put these different types of things. But really, each of these is just a folder and every picture, every video, every song is just a file. These are the basic building blocks. This is what the computer works with to do all of the jobs that you ask it to do. So here we'll dive down into the Documents folder and we see there are a number of folders in it already. I've created several folders. One is called NMD Directory. One is called Directory with one file in it. Directory with other directories in it and a directory with several files in it. You can double-click any one of these to open them. We'll open NMD Directory and sure enough, it's empty. There's nothing in it. If we go back and open up a directory with one file in it, we can see, sure enough, there is a file in it, which I've called a text file. By mousing over it, you can see some information about it such as how large it is, the number of bytes, and when it was created. If we double-click on it, it'll open up in another program which shows us text files called Notepad. And here we can see that this file just has a few letters in it that spell out a file with some text in it. We can go back, open up a directory with several files in it. This one also has a text file and it has an image, restingpup.jpg. It's a jpeg, an image file. We can go back to a directory with other directories in it and see that sure enough, it has a directory in it called another directory, which itself holds a directory called yet another directory, which holds two files, a text file and another image file called curiouspup.jpg. Double-clicking on that opens it up in a program that lets us look at it up close and view it. And if we want to, we can create a new directory within this directory. Window often refers to them as folders, but the word folder and directory mean exactly the same thing when it comes to computers. We can select new folder and name it still another directory. We can do this as many times as we want. We can go as deep as we want, create as many folders as we want in any given directory, put as many files as we want in any given folder. This is how the computer organizes all of the files, which are the basis of everything that it does. This will be the foundation of the work that we do when writing and running Python programs. So this is an important first step to cover.