1 00:00:00,700 --> 00:00:01,450 ‫Welcome back. 2 00:00:02,140 --> 00:00:10,540 ‫This short video is for those who haven't really worked with Linux and Mac OS Terminal or Windows Command 3 00:00:10,540 --> 00:00:11,020 ‫prompt. 4 00:00:11,440 --> 00:00:20,110 ‫So if you are like me some years ago who hasn't really encountered terminal or command prompt, then 5 00:00:20,110 --> 00:00:21,130 ‫this video is for you. 6 00:00:21,760 --> 00:00:28,870 ‫If you are familiar with terminal or command prompt, then please skip the video. 7 00:00:29,410 --> 00:00:38,440 ‫This video is really for people who have almost never encountered Linux Terminal or Windows Command 8 00:00:38,440 --> 00:00:48,640 ‫prompt or Mac OS Terminal, both the terminal in Linux and the Mac OS, and then the command prompt 9 00:00:48,640 --> 00:00:49,540 ‫in Windows. 10 00:00:50,140 --> 00:00:51,340 ‫They're very similar. 11 00:00:51,850 --> 00:00:58,810 ‫And in this course, I recommend you to use terminal or command prompt to run Python files. 12 00:00:59,410 --> 00:01:08,200 ‫And so I'm going to give you a short explanation of how to use terminal or command prompt for the purposes 13 00:01:08,200 --> 00:01:09,100 ‫of this course. 14 00:01:09,370 --> 00:01:16,270 ‫Essentially, I want you to know how to launch Python programs using terminal or command prompt. 15 00:01:16,720 --> 00:01:21,250 ‫So if you look at the screen, then you know that I'm in my desktop. 16 00:01:21,790 --> 00:01:25,120 ‫And so now I'm going to go into my default home folder. 17 00:01:25,630 --> 00:01:32,680 ‫So you see that I'm in my default home folder and then I have a lot of files here and now from this 18 00:01:32,680 --> 00:01:34,270 ‫default home folder. 19 00:01:34,930 --> 00:01:41,620 ‫I want to enter into my desktop folder, and my desktop folder is right here, so I'm going to click 20 00:01:41,620 --> 00:01:41,830 ‫it. 21 00:01:42,430 --> 00:01:46,960 ‫And you see, I have my files here, these files that you see here. 22 00:01:47,560 --> 00:01:49,750 ‫These are these files here. 23 00:01:50,260 --> 00:01:51,430 ‫So it's the same thing. 24 00:01:51,940 --> 00:01:58,180 ‫And now let's say that I want to go back into my default home folder, so I'm going to go here. 25 00:01:58,810 --> 00:01:59,260 ‫OK? 26 00:01:59,770 --> 00:02:05,200 ‫This is how most people in the world use computers. 27 00:02:05,770 --> 00:02:09,730 ‫However, there is another way to navigate through these folders. 28 00:02:10,120 --> 00:02:13,600 ‫Here I have my terminal and in windows. 29 00:02:13,930 --> 00:02:16,260 ‫It would be command prompt. 30 00:02:16,750 --> 00:02:19,330 ‫And in macOS you also have a terminal. 31 00:02:19,780 --> 00:02:27,250 ‫And so I have opened my terminal and actually here inside my terminal, I'm inside my home folder so 32 00:02:27,250 --> 00:02:28,960 ‫I can write here else. 33 00:02:29,560 --> 00:02:34,060 ‫And that command will show me all the files that I have in my home folder. 34 00:02:34,630 --> 00:02:35,380 ‫And there you go. 35 00:02:35,410 --> 00:02:37,450 ‫You see, I have all my files here. 36 00:02:37,990 --> 00:02:42,090 ‫And by the way, if you are in windows, then you don't write else. 37 00:02:42,400 --> 00:02:43,690 ‫You write dear. 38 00:02:44,290 --> 00:02:45,880 ‫But in Linux, you write less. 39 00:02:51,520 --> 00:03:01,480 ‫So being here is the same like being here now, if I don't want to see those files anymore, then I'll 40 00:03:01,480 --> 00:03:02,590 ‫just write clear. 41 00:03:03,250 --> 00:03:12,550 ‫And now, just like we went from our default home folder into our desktop folder and then we went back 42 00:03:12,550 --> 00:03:14,110 ‫to our home folder. 43 00:03:14,710 --> 00:03:22,000 ‫What we did, we navigated through folders, but we can also do it through the terminal and we do like 44 00:03:22,000 --> 00:03:23,530 ‫this seed. 45 00:03:24,460 --> 00:03:26,950 ‫And then we write desktop. 46 00:03:27,460 --> 00:03:31,390 ‫And now what we have done, we have done this. 47 00:03:31,720 --> 00:03:41,980 ‫We have entered into our desktop folder, but through our terminal and by the way, in Windows and in 48 00:03:41,980 --> 00:03:44,440 ‫Mac OS, it's the same thing. 49 00:03:45,100 --> 00:03:48,470 ‫If you want to change your folder in Windows, you write code. 50 00:03:49,390 --> 00:03:51,940 ‫And the same thing applies to Mac OS. 51 00:03:52,570 --> 00:03:57,820 ‫And now if I want to see what I have inside my desktop, then I write less. 52 00:03:58,450 --> 00:04:00,970 ‫And you can see I have the same files here. 53 00:04:01,570 --> 00:04:08,680 ‫So right now, I'm in my desktop folder, in my screen and also in my terminal. 54 00:04:09,190 --> 00:04:13,210 ‫And now let's say that I want to enter my folder here. 55 00:04:13,510 --> 00:04:18,970 ‫So you see, I have more files here, and I can do the same thing in my terminal. 56 00:04:19,450 --> 00:04:23,350 ‫I write code, which is change directory. 57 00:04:23,920 --> 00:04:28,810 ‫And then the name of the folder empty copied Udemy course. 58 00:04:29,410 --> 00:04:39,490 ‫And by the way, in terminal, you can complete the names of the folders or the files with a tap button. 59 00:04:40,090 --> 00:04:48,510 ‫So, for example, I have only written this part and then I click the tap button and it has auto completed 60 00:04:48,520 --> 00:04:53,680 ‫the name of the folder and then I click Enter and I'm inside the folder. 61 00:04:54,310 --> 00:04:55,440 ‫I write else. 62 00:04:56,020 --> 00:05:06,910 ‫And as you can see, I'm now inside the folder called NPC PID Udemy course, and you can see that the 63 00:05:06,910 --> 00:05:09,640 ‫same files that I have here, the same folders. 64 00:05:09,880 --> 00:05:11,320 ‫I also have them here. 65 00:05:11,890 --> 00:05:12,550 ‫All of them. 66 00:05:13,180 --> 00:05:18,430 ‫Of course, you need to have that specific folder in your current location. 67 00:05:18,460 --> 00:05:23,860 ‫Only then you can enter into the folder through this see command. 68 00:05:24,400 --> 00:05:28,030 ‫If you don't have that folder in your current location, then you can do it. 69 00:05:28,660 --> 00:05:35,180 ‫You can only enter into the folders that you actually have in your current location in your computer. 70 00:05:35,800 --> 00:05:43,210 ‫Just like when you're in your desktop, you cannot enter into the folders from your desktop that you 71 00:05:43,220 --> 00:05:45,280 ‫do not have on your desktop. 72 00:05:45,880 --> 00:05:50,860 ‫The same logic applies to Terminal and Windows Command prompt. 73 00:05:51,340 --> 00:05:59,170 ‫If I want to go back, I write C d space two dots enter and then I'm back. 74 00:05:59,710 --> 00:06:05,310 ‫And so again, if I want to go one folder back, I can just write code. 75 00:06:05,950 --> 00:06:09,970 ‫Two dots and guess where I am at right now. 76 00:06:10,600 --> 00:06:16,060 ‫Well, I went to folders back and now I'm again in my home folder. 77 00:06:16,660 --> 00:06:25,750 ‫And so if you haven't really worked with Terminal or command prompt before, then do like I do when 78 00:06:25,750 --> 00:06:31,300 ‫you write your Python script, then just save it in your desktop. 79 00:06:31,880 --> 00:06:33,010 ‫Just save it here. 80 00:06:33,580 --> 00:06:38,830 ‫And so when you're in your desktop, then you can see that your saved file is here. 81 00:06:39,400 --> 00:06:46,780 ‫And so when you're in your home folder in your terminal or command prompt, then just go into your desktop 82 00:06:46,780 --> 00:06:51,070 ‫folder, see the desktop again. 83 00:06:51,160 --> 00:06:55,960 ‫See the is in Linux, Windows and Mac OS. 84 00:06:56,590 --> 00:07:04,900 ‫Now, when you are in your desktop, then you write either Alice in Linux or did it in Windows Command 85 00:07:04,900 --> 00:07:06,790 ‫prompt in Mac OS. 86 00:07:07,450 --> 00:07:08,890 ‫It's also Alice. 87 00:07:09,460 --> 00:07:16,510 ‫And then you can see the files that you have in your desktop, so you have to Python files here. 88 00:07:17,290 --> 00:07:22,770 ‫This one here and this one here, I remember Python files. 89 00:07:22,780 --> 00:07:27,550 ‫They need to be saved with this Dot Pi extension. 90 00:07:28,180 --> 00:07:35,530 ‫And so when your file is in your desktop and you are inside your desktop, but through your terminal 91 00:07:35,530 --> 00:07:41,950 ‫or Windows Command prompt, then in Linux Terminal you run your Python file like this. 92 00:07:42,550 --> 00:07:50,290 ‫You write Python three and then the name of the file, which in this case is this one. 93 00:07:50,910 --> 00:07:58,740 ‫And then you press enter, if you have an error there, then it will display you this error, for example, 94 00:07:58,740 --> 00:08:02,160 ‫I have an error here in Line 15. 95 00:08:02,790 --> 00:08:11,340 ‫In that case, you have to enter into your Python file that you had saved in your desktop, which is 96 00:08:11,340 --> 00:08:12,420 ‫this one here. 97 00:08:13,050 --> 00:08:19,980 ‫And so I have a bunch of stuff that I haven't commented out, so I'm just going to delete it and so 98 00:08:19,980 --> 00:08:21,240 ‫I'm going to save the file. 99 00:08:21,870 --> 00:08:29,880 ‫This is the file that is saved here in desktop and then I can close the file, and so I'm going to clear 100 00:08:29,880 --> 00:08:30,810 ‫my terminal. 101 00:08:31,410 --> 00:08:34,050 ‫But you can see that I'm still in my desktop. 102 00:08:34,680 --> 00:08:41,040 ‫And so in order to run the file, I write Python three and then calculus seems straight. 103 00:08:41,040 --> 00:08:43,890 ‫Line that pie and enter. 104 00:08:44,430 --> 00:08:45,330 ‫And there you go. 105 00:08:45,900 --> 00:08:54,090 ‫You see, the python file is running if you want to close the file and you just press X. And that's 106 00:08:54,090 --> 00:08:57,690 ‫how you run a python file with your terminal. 107 00:08:58,020 --> 00:09:03,390 ‫Now, if you have Windows Command prompt, then it's a bit different. 108 00:09:03,960 --> 00:09:10,990 ‫Well, in fact, the only difference is that in Windows Command prompt, you don't write this. 109 00:09:11,550 --> 00:09:18,030 ‫Once you're in your desktop, you simply write the name of the file. 110 00:09:18,540 --> 00:09:21,480 ‫So this would be in Windows Command prompt. 111 00:09:26,830 --> 00:09:31,780 ‫This one is in Linux Terminal and in Mac OS terminal. 112 00:09:32,170 --> 00:09:38,740 ‫So in Linux Terminal and Mac OS Terminal, you have to write Python three and then space. 113 00:09:39,100 --> 00:09:41,680 ‫And the name of the Python file. 114 00:09:42,250 --> 00:09:47,200 ‫And don't forget the Dart Pi extension in Windows Terminal. 115 00:09:47,800 --> 00:09:57,160 ‫You simply write the name of the Python file with this Dart Pi extension and then you press enter. 116 00:09:57,700 --> 00:09:59,050 ‫And that's the only difference. 117 00:09:59,500 --> 00:10:07,660 ‫And now if I want to print something, so let's say that I enter into this file again, and let's say 118 00:10:07,660 --> 00:10:11,110 ‫that I want to print this distance array. 119 00:10:11,680 --> 00:10:12,530 ‫Then I write here. 120 00:10:12,550 --> 00:10:14,560 ‫Print distance. 121 00:10:15,190 --> 00:10:16,120 ‫I save it. 122 00:10:16,600 --> 00:10:17,800 ‫I close it. 123 00:10:18,400 --> 00:10:24,880 ‫And then if I run my python file again, then of course, I cannot do it like this because I'm using 124 00:10:24,880 --> 00:10:27,550 ‫Linux in Windows Command prompt. 125 00:10:27,730 --> 00:10:31,810 ‫You would do it like this, but in Linux, I write it like this. 126 00:10:32,320 --> 00:10:36,700 ‫And by the way, Terminal remembers your previous commands. 127 00:10:36,940 --> 00:10:44,080 ‫So let's say that you're in your desktop, and if you press the arrow up, then you get your previous 128 00:10:44,080 --> 00:10:44,560 ‫command. 129 00:10:45,040 --> 00:10:50,320 ‫You press the arrow up again and then you get the command before that. 130 00:10:50,800 --> 00:10:54,040 ‫So with this command, I run my Python file. 131 00:10:54,580 --> 00:10:56,350 ‫I have my animation here. 132 00:10:56,980 --> 00:11:01,090 ‫And as you can see, I have printed my distance array. 133 00:11:01,630 --> 00:11:04,300 ‫So if I make it bigger and there you go. 134 00:11:04,660 --> 00:11:06,340 ‫This is your distance array. 135 00:11:06,940 --> 00:11:08,410 ‫So we right clear. 136 00:11:09,040 --> 00:11:17,830 ‫And by the way, there are many commands both in Linux and Mac OS Terminal and Windows Command prompt. 137 00:11:18,340 --> 00:11:24,100 ‫You can copy paste files using terminal or command prompt. 138 00:11:24,670 --> 00:11:31,660 ‫You can move files from one folder to another folder using terminal or command prompt. 139 00:11:32,200 --> 00:11:38,290 ‫You can delete files and install programs using terminal and command prompt. 140 00:11:38,740 --> 00:11:46,660 ‫And the thing is that if you get used to it and you do it many times, then you might be faster working 141 00:11:46,660 --> 00:11:54,970 ‫in your terminal or command prompt than in the traditional way where you would enter your folder and 142 00:11:54,970 --> 00:11:58,560 ‫then either press Control C Control V. 143 00:11:58,570 --> 00:12:05,890 ‫If you want to copy, paste it or click the right click and then copy and then paste. 144 00:12:06,370 --> 00:12:11,770 ‫And so it's a nice thing to learn to work with terminal or command prompt. 145 00:12:12,250 --> 00:12:18,040 ‫And there are many good tutorials on YouTube that I have used to learn about it. 146 00:12:18,520 --> 00:12:25,000 ‫And so let's say that I want to enter into my MP Udemy course folder again. 147 00:12:25,600 --> 00:12:26,410 ‫So I'm here. 148 00:12:26,860 --> 00:12:30,040 ‫Now you already know how to go back right seed. 149 00:12:30,940 --> 00:12:32,800 ‫And then space and two dots. 150 00:12:33,430 --> 00:12:37,420 ‫However, what happens if I don't put those two dots? 151 00:12:38,080 --> 00:12:43,060 ‫If I only put CD, then no matter in which folder you are. 152 00:12:43,660 --> 00:12:47,650 ‫You go back into your default home folder. 153 00:12:48,250 --> 00:12:51,760 ‫And so that's it on the terminal and the command prompt. 154 00:12:52,210 --> 00:12:53,170 ‫Thank you very much.