1 00:00:01,760 --> 00:00:04,760 Hi, and welcome to today's programming Tool. 2 00:00:04,880 --> 00:00:09,710 Today, I'm very excited to introduce you to a new skill. 3 00:00:11,020 --> 00:00:14,320 This is a must have skill for any programmer. 4 00:00:14,380 --> 00:00:16,270 And this skill is. 5 00:00:17,980 --> 00:00:23,560 The skill of controlling the versions of your programs, in other words. 6 00:00:24,640 --> 00:00:25,980 Version control. 7 00:00:25,990 --> 00:00:28,840 So version control is a practice. 8 00:00:30,100 --> 00:00:34,030 That allows you to track changes in your code. 9 00:00:35,080 --> 00:00:36,880 And manage those changes. 10 00:00:36,880 --> 00:00:40,600 So let me explain what I'm talking about with an example. 11 00:00:44,290 --> 00:00:47,170 This is the state of our code at the moment. 12 00:00:47,170 --> 00:00:51,130 But let's suppose that we have an issue with the added. 13 00:00:52,140 --> 00:00:52,950 Keys. 14 00:00:53,880 --> 00:00:55,380 We realize that. 15 00:00:56,330 --> 00:00:59,690 About five days ago, we made a change which. 16 00:01:00,960 --> 00:01:03,450 Cause the issue we have now. 17 00:01:03,450 --> 00:01:06,240 So what we want to do is we want to go back. 18 00:01:07,360 --> 00:01:10,900 To the state of the code as it was five days ago. 19 00:01:14,060 --> 00:01:16,970 You cannot do that with undue. 20 00:01:17,870 --> 00:01:20,420 Because you have saved the codes already. 21 00:01:20,420 --> 00:01:21,940 You have close by charm. 22 00:01:21,950 --> 00:01:23,420 You have reopen it again. 23 00:01:24,920 --> 00:01:27,890 So undoing the changes is not an option. 24 00:01:28,340 --> 00:01:30,670 All you're left with is your memory. 25 00:01:30,680 --> 00:01:31,370 You try. 26 00:01:31,410 --> 00:01:39,860 You'll try to remember what you did change back then, and then try to rewrite the code as it was. 27 00:01:41,730 --> 00:01:43,650 And that's not the best solution. 28 00:01:43,740 --> 00:01:47,520 That's why we have version control systems. 29 00:01:48,180 --> 00:01:51,870 So we have version control and version control systems. 30 00:01:51,990 --> 00:01:57,630 Version control systems are software which we will install on our computer. 31 00:01:57,630 --> 00:01:59,760 You will install it on your computer as well. 32 00:01:59,820 --> 00:02:07,260 And that system allows you to control the versions of your programs, of your Python programs. 33 00:02:09,680 --> 00:02:15,170 Practically in this case, if we had used a version control system. 34 00:02:16,430 --> 00:02:20,930 With our project here, we would be able to easily go back. 35 00:02:21,600 --> 00:02:28,140 And see the code as it was five days ago, and then we can reuse that version of the code. 36 00:02:30,000 --> 00:02:34,650 Or just pull up certain changes from that code. 37 00:02:35,310 --> 00:02:43,950 We can compare that code with our code as so we have control over the versions of our programs. 38 00:02:46,630 --> 00:02:53,110 So as I mentioned, to control the version of your program, you need to use a version control system, 39 00:02:53,110 --> 00:02:55,660 which is a software you install. 40 00:02:56,110 --> 00:03:03,490 So now I'll mention the main version, control systems which can be used and we'll have to pick one 41 00:03:03,490 --> 00:03:04,060 of them. 42 00:03:06,040 --> 00:03:07,510 The first one is good. 43 00:03:09,540 --> 00:03:14,850 And Git is also the most popular version control system, and that's the one we will use. 44 00:03:15,060 --> 00:03:18,850 But just for knowledge, I'll also mention the other systems as well. 45 00:03:18,870 --> 00:03:27,540 We have Apache Subversion Bazaar and Mercurial to mention just a few of them. 46 00:03:29,480 --> 00:03:36,440 Of course, there are slight changes between those are, but the most popular one and the best one is 47 00:03:36,440 --> 00:03:37,700 also get. 48 00:03:37,700 --> 00:03:41,570 So we'll be using it and I will. 49 00:03:42,510 --> 00:03:45,440 Take you through using it in the next day. 50 00:03:45,460 --> 00:03:48,090 So tomorrow in the programming tool of tomorrow. 51 00:03:48,570 --> 00:03:55,230 Today I just want to make you familiar to to make you understand what version control is. 52 00:03:58,370 --> 00:04:04,820 So tomorrow we will install gates and we will connect it with our projects so that we can keep track 53 00:04:04,820 --> 00:04:08,900 of our changes, so we can control the version. 54 00:04:09,110 --> 00:04:18,620 But before we go to tomorrow's video, I want to show you a glimpse of a version control. 55 00:04:20,160 --> 00:04:22,830 So this is one of my personal projects. 56 00:04:23,460 --> 00:04:24,600 This is a. 57 00:04:25,240 --> 00:04:27,940 Project, a Python based project. 58 00:04:29,060 --> 00:04:34,010 Which constructs a web app, and it's based in the Django framework. 59 00:04:34,730 --> 00:04:38,540 So this is the Python code base and. 60 00:04:42,960 --> 00:04:49,710 If you go to this button here, of course you don't have this because you have not enabled get yet. 61 00:04:49,710 --> 00:04:51,900 But I have enabled kids in this project. 62 00:04:51,900 --> 00:04:59,430 So if I go to that button, I'll have access to all the changes I have made across. 63 00:05:00,450 --> 00:05:01,660 Different days. 64 00:05:01,680 --> 00:05:09,840 So, for example, if I want to see how my code was at this change here, when I added an exercise and 65 00:05:09,840 --> 00:05:11,700 I recorded that change in here. 66 00:05:11,790 --> 00:05:18,300 So I can just right click here and then I can compare that file with the local file. 67 00:05:18,300 --> 00:05:21,840 So then I'll I'll see here. 68 00:05:23,040 --> 00:05:25,440 The file as it was back then. 69 00:05:25,540 --> 00:05:32,160 And then here on the right, I have the current view of the file, how the file is now and how the file 70 00:05:32,160 --> 00:05:34,650 was back then when I made that change. 71 00:05:40,970 --> 00:05:43,610 Lots of changes are highlighted, as you can see here. 72 00:05:45,290 --> 00:05:46,220 And so on. 73 00:05:47,740 --> 00:05:50,660 So I have recorded different changes in here. 74 00:05:50,680 --> 00:05:57,430 I can click any of them and here on the right I can see the files that were changed that day. 75 00:05:59,750 --> 00:06:00,260 And so on. 76 00:06:00,260 --> 00:06:01,010 So that's. 77 00:06:01,940 --> 00:06:04,100 How it works in a nutshell. 78 00:06:04,850 --> 00:06:11,450 I'll take you through how to make these changes, how to record the changes, how to see the changes. 79 00:06:11,450 --> 00:06:12,870 So don't worry about that. 80 00:06:12,890 --> 00:06:14,300 This was just to show you. 81 00:06:15,320 --> 00:06:16,970 Get in a nutshell. 82 00:06:17,950 --> 00:06:23,560 Now this was get the software we installed to help us. 83 00:06:24,630 --> 00:06:27,780 See these changes in our program. 84 00:06:27,780 --> 00:06:29,910 But there's also get hope. 85 00:06:30,420 --> 00:06:31,710 Maybe you have heard of it. 86 00:06:32,310 --> 00:06:44,430 GitHub is a software hosting platform, so all these folders that you see here and all the files inside 87 00:06:44,430 --> 00:06:48,940 them, for example, views that P inside blog. 88 00:06:48,960 --> 00:06:53,070 This file is also in here in my project here. 89 00:06:54,440 --> 00:06:55,430 Python home. 90 00:06:57,730 --> 00:06:58,920 So that is the file. 91 00:06:58,930 --> 00:07:03,640 So all these files are uploaded to GitHub. 92 00:07:04,600 --> 00:07:08,860 So why would you want to upload your your program files to GitHub? 93 00:07:08,890 --> 00:07:10,990 Well, that's for several reasons. 94 00:07:11,590 --> 00:07:16,750 First, you can use GitHub as a backup system, so it's cloud based. 95 00:07:16,870 --> 00:07:21,490 If you lose access to your files, to your hard drive. 96 00:07:23,310 --> 00:07:30,420 You lose your computer, etc. Then you have the files on GitHub and I'll show you how to synchronize 97 00:07:30,420 --> 00:07:31,200 your files. 98 00:07:31,920 --> 00:07:36,630 So they are always up to date with the GitHub platform. 99 00:07:37,020 --> 00:07:39,540 So backups is one reason. 100 00:07:39,840 --> 00:07:44,490 Other reasons are you may want to share your code with other people. 101 00:07:46,270 --> 00:07:54,430 So you may want to create a portfolio for potential employers to see your codes or clients. 102 00:07:55,000 --> 00:07:57,160 And GetUp! 103 00:07:57,190 --> 00:08:02,560 Can also be used when you want someone to collaborate with your projects. 104 00:08:03,940 --> 00:08:11,380 So both you and your collaborator can make changes on your own computers and you can upload to the changes 105 00:08:11,590 --> 00:08:13,630 to GitHub and. 106 00:08:14,710 --> 00:08:23,020 Everything there is tracked, so everything is synchronized with the changes you have on Git. 107 00:08:23,020 --> 00:08:25,960 So Git and GitHub are synchronized with each other. 108 00:08:25,990 --> 00:08:33,490 Git is local and github is cloud based to back up your code and to be able to share your code with other 109 00:08:33,490 --> 00:08:34,150 people. 110 00:08:35,390 --> 00:08:41,059 Another rule of GitHub is that, for example, in my case. 111 00:08:44,280 --> 00:08:49,200 It allows me to upload the code to the web server. 112 00:08:49,200 --> 00:08:53,490 So that's the product of that code that you see here. 113 00:08:54,120 --> 00:09:02,520 So this is a web app I've built in Python, and this web app has to be run in some remote servers. 114 00:09:03,060 --> 00:09:13,980 So that means I have to upload all this code to that remote server and GitHub serves as an intermediary. 115 00:09:14,160 --> 00:09:20,190 So I upload my code to GitHub and then I get the code from GitHub to the server. 116 00:09:24,120 --> 00:09:30,560 And so that was the lecture own version, control version, control systems, Git and GitHub. 117 00:09:30,570 --> 00:09:40,110 So as a summary version, control is the practice of recording the changes you do on your programs. 118 00:09:40,110 --> 00:09:47,520 And the way to record your changes is to install a software which I'll cover later. 119 00:09:47,640 --> 00:09:51,690 So the software itself is the version control system. 120 00:09:53,200 --> 00:09:59,170 Then you have extras, which is this cloud based software hosting solution. 121 00:09:59,350 --> 00:10:07,030 So such as GitHub where you can upload your code to have a backup and it also allows you to share your 122 00:10:07,030 --> 00:10:08,140 code with others. 123 00:10:10,270 --> 00:10:11,650 And that's about this video. 124 00:10:12,850 --> 00:10:19,740 Tomorrow I'll take you through installing and using good step by step so you can use it on your computer. 125 00:10:19,750 --> 00:10:20,950 So I'll see you tomorrow. 126 00:10:20,950 --> 00:10:21,100 See?