1 00:00:00,600 --> 00:00:06,840 Well in this lecture I'll show you how to set up the Jupiter Notebook or Jupiter for short and also 2 00:00:06,840 --> 00:00:08,070 how to use it. 3 00:00:08,700 --> 00:00:15,240 So far you've worked both with Python and an iPython interactive shell but also you work with 4 00:00:15,510 --> 00:00:18,380 an editor such as Atom. 5 00:00:18,990 --> 00:00:27,870 Sometimes you may have the need for a hybrid between an interactive shell and an editor. When you 6 00:00:27,870 --> 00:00:35,160 want to test things out but you also want to just save your blocks of code that you were writing because 7 00:00:35,160 --> 00:00:38,880 an interactive shell is great for testing things quickly. 8 00:00:39,410 --> 00:00:45,930 But you can�t save the code and the editor is good for saving the code but it's not great for testing 9 00:00:45,930 --> 00:00:46,990 things. 10 00:00:47,190 --> 00:00:54,330 But I can tell you were that such a hybrid tool is that it's called Jupiter Notebook and that is an 11 00:00:54,330 --> 00:00:57,430 amazing tool that will boost your productivity. 12 00:00:57,510 --> 00:01:04,110 And Jupiter is especially good when you're working with data as it's a great environment to explore 13 00:01:04,120 --> 00:01:08,190 data and you'll see its usefulness in just a bit. 14 00:01:08,220 --> 00:01:14,130 Of course you still want to use editor such as Atom when you're working with multiple Python scripts 15 00:01:14,160 --> 00:01:20,450 that interact with each other. That's the case of a web application 16 00:01:20,450 --> 00:01:23,080 for example when you're developing web applications. 17 00:01:23,250 --> 00:01:28,650 You'll have to deal with multiple Python scripts and also HTML files CSS and other files 18 00:01:28,680 --> 00:01:29,870 as well. 19 00:01:30,000 --> 00:01:35,130 We well build a web application later of course and you'll see how Atom is good for that. 20 00:01:35,910 --> 00:01:38,490 But for data use Jupiter. 21 00:01:38,590 --> 00:01:41,640 So Jupiter, let's see how to install it. 22 00:01:42,000 --> 00:01:49,530 Well we can go to the instalation so install and you can go through these instructions. 23 00:01:49,950 --> 00:01:56,880 But instead of going for this advice you actually to use your command line to install Jupiter. 24 00:01:56,880 --> 00:02:03,720 Typing pip install Jupiter. 25 00:02:03,990 --> 00:02:12,490 So that will download Jupiter and it will install it in your system. And then to start a Jupiter session 26 00:02:12,510 --> 00:02:16,100 a good practice is to go to a folder. 27 00:02:17,490 --> 00:02:30,250 Let's say test 3 and here you can open a command prompt and then you type Jupiter Notebook 28 00:02:32,470 --> 00:02:33,830 That will open 29 00:02:33,970 --> 00:02:39,670 a Jupiter session in the browser. So the Jupiter an old book is actually a browser notebook. 30 00:02:39,870 --> 00:02:46,110 The reason I opened the Jupiter notebook in the command line was that at least we know so when you do 31 00:02:46,110 --> 00:02:51,750 shift and then right click on the folder your command prompt is opened in the current folder. 32 00:02:51,750 --> 00:02:52,880 So in this one here. 33 00:02:53,310 --> 00:03:00,470 And then when you create a notebook file now every file will be saved in this directory here. 34 00:03:00,990 --> 00:03:08,180 Alternatively you can open your command prompt everywhere you want and then you can CD to the folder where 35 00:03:08,190 --> 00:03:11,250 you want to save your Jupiter Notebooks. 36 00:03:11,250 --> 00:03:11,640 All right. 37 00:03:11,640 --> 00:03:13,290 Now we don't have anything here. 38 00:03:13,430 --> 00:03:23,070 So what you can do is create a notebook and we installed Jupiter as Python Library so under notebooks 39 00:03:23,070 --> 00:03:25,360 we have Python 3 available. 40 00:03:25,680 --> 00:03:33,430 So the kernel with the Python 3 if you have associated all the languages here you'll see them under 41 00:03:33,450 --> 00:03:35,780 here on their notebooks. 42 00:03:35,870 --> 00:03:39,150 So this is an empty notebook. 43 00:03:40,140 --> 00:03:46,460 This is the name of a notebook and you can change it to let's say testing. 44 00:03:47,590 --> 00:03:48,660 Press Ok. 45 00:03:49,380 --> 00:03:57,240 And if you go to the folder you'll see that a file with testing name and iPython notebook extension 46 00:03:57,240 --> 00:04:03,450 was created so that it's created automatically every time you type something you do some changes or 47 00:04:03,450 --> 00:04:04,380 something. 48 00:04:04,380 --> 00:04:11,370 Now let me show you how you can work with the iPython Notebook so you can consider every cell of� This cell 49 00:04:11,640 --> 00:04:16,720 and you can consider every cell as a line in you know normal Python shell. 50 00:04:16,890 --> 00:04:23,980 But here in this trial you can actually write multiple lines of code let's say print 1 and then 51 00:04:24,330 --> 00:04:27,640 if you don't want to execute this right away you can press enter. 52 00:04:27,700 --> 00:04:33,270 So we enter you enter a new line in the cell and then print 2 and so on. 53 00:04:33,270 --> 00:04:41,330 And if you want to execute the cell now you can't press Control Enter and you get the output. 54 00:04:41,340 --> 00:04:46,630 Now if you want to create a new cell ALT enter it would do that. 55 00:04:47,040 --> 00:04:51,640 And here you can write another block of code. 56 00:04:51,690 --> 00:04:55,310 With Enter you go to the next line and so on. 57 00:04:55,350 --> 00:05:00,150 And if you want to go to the next cell right away. 58 00:05:00,420 --> 00:05:06,410 So before we pressed Control Enter now you can press Shift Enter and you go to the next cell automatically. 59 00:05:06,770 --> 00:05:08,030 With Shift Enter 60 00:05:08,040 --> 00:05:11,710 you also execute the cell what are you working on. 61 00:05:11,890 --> 00:05:17,310 You're going create new cells with ALT Enter and you can deal with them by pressing first you press 62 00:05:17,760 --> 00:05:23,420 Escape and then you press dd 2 times dd again. 63 00:05:23,490 --> 00:05:25,220 So it's quite flexible. 64 00:05:25,610 --> 00:05:28,890 Something you shouldn't notice is that we have two modes. 65 00:05:28,890 --> 00:05:31,650 Basically we have the command mode. 66 00:05:31,650 --> 00:05:39,570 So when you are in the common mode you see a gray rectangle around the cell and when you are to go to 67 00:05:39,570 --> 00:05:41,820 the edit more then you press Enter. 68 00:05:41,820 --> 00:05:47,560 So while you are focused on the current cell you press Eneter and then you edit the cell. 69 00:05:48,320 --> 00:05:54,100 So in edit mode when you type things you're inserting text in the cell. 70 00:05:54,140 --> 00:05:59,140 You�re inserting code is in the cell. Escape and common mode. 71 00:05:59,360 --> 00:06:06,180 Dd and you delete the cell. ALT Enter and you enter a new cell. 72 00:06:06,270 --> 00:06:10,380 So these are the most used short cuts, keyboard shortcuts. 73 00:06:10,540 --> 00:06:17,100 But if you want to know more shortcuts you can go to Help and then Keyboard Shortcuts and then you see 74 00:06:17,130 --> 00:06:18,880 a list here. 75 00:06:20,250 --> 00:06:23,220 But these are good to get started. 76 00:06:23,220 --> 00:06:29,220 When you're done with this you can just close the tab and you can also close the directory tree here 77 00:06:29,240 --> 00:06:29,490 . 78 00:06:29,760 --> 00:06:34,720 So notice that Jupiter actually opens in a local host session. 79 00:06:35,030 --> 00:06:43,320 And if you want to open again your notebook you can go here again and go to Open Command Window 80 00:06:43,320 --> 00:06:49,180 here and Jupiter Notebook. 81 00:06:50,340 --> 00:06:56,270 And here is the file and it's just as we left it. 82 00:06:56,280 --> 00:07:02,950 Now a Jupiter notebook is best used for doing explorations and especially data explorations. 83 00:07:03,150 --> 00:07:09,540 So if you're working with data analysis or data visualizations the Jupiter Notebook 84 00:07:09,540 --> 00:07:11,440 is perfect to use. 85 00:07:11,670 --> 00:07:18,480 You can use the Jupiter Notebook for example to load a table of data in the session. 86 00:07:18,560 --> 00:07:21,420 And for that you'd use Pandas. 87 00:07:22,230 --> 00:07:27,930 So you import the library, you press Enter or Shift Enter to go to the next cell and you press Enter 88 00:07:27,930 --> 00:07:29,720 again to write something. 89 00:07:29,850 --> 00:07:33,830 So let's say df equals to Pandas.readcsv. 90 00:07:37,300 --> 00:07:47,100 And I have a CSV file somewhere in my system. 91 00:07:47,100 --> 00:07:50,770 Press Enter and Wow. 92 00:07:52,110 --> 00:07:59,160 So you get a nice HTML table which was loaded from the CSV file and you can also plot graphs in the Jupiter 93 00:07:59,300 --> 00:07:59,960 Notebook. 94 00:08:00,030 --> 00:08:03,130 So that's also something you're learning in the course. 95 00:08:03,510 --> 00:08:06,360 So data analysis and visualizations. 96 00:08:06,360 --> 00:08:12,840 You can also use the Jupiter Notebook for web scrapping and that is very convenient because you 97 00:08:12,960 --> 00:08:20,310 have these blocks of code and then the you have to continuously tweak the code so you may want to change 98 00:08:20,310 --> 00:08:24,550 something here and then you get a nice display. 99 00:08:24,700 --> 00:08:31,020 Not this one exactly because this is a messed up stream but this one for instance you have a slider 100 00:08:31,020 --> 00:08:40,260 here so you can scroll up and down you know inside a separate window that doesn't affect you or general 101 00:08:40,560 --> 00:08:41,760 your main window. 102 00:08:41,790 --> 00:08:48,540 So I hope you have gotten a good idea of the Jupiter Notebook. Just take a note of the shortcuts 103 00:08:48,540 --> 00:08:51,120 all the keyboard shortcuts to execute 104 00:08:51,120 --> 00:08:57,790 code the edits and the command mode you know. Enter Escape and Enter again and so on and so forth. 105 00:08:57,960 --> 00:09:00,390 And you just practice them a little bit. 106 00:09:00,420 --> 00:09:02,620 You'll get used with Jupiter 107 00:09:02,820 --> 00:09:05,670 very quickly. See where the next lecture.