1 00:00:00,768 --> 00:00:05,632 ‫So we have started this jupyter notebook from Anaconda navigator. 2 00:00:05,888 --> 00:00:11,776 ‫Now to create a new notebook click on this new button in the top right corner 3 00:00:12,544 --> 00:00:14,336 ‫And click on Python 3. 4 00:00:15,616 --> 00:00:17,408 ‫This will open a new notebook 5 00:00:17,664 --> 00:00:18,688 ‫In a new tab. 6 00:00:24,064 --> 00:00:26,624 ‫This is default jupyter-notebook interface. 7 00:00:27,648 --> 00:00:31,488 ‫In Notebook you write and run your quotes in a small segment 8 00:00:32,000 --> 00:00:34,560 ‫And the segments are called cells. 9 00:00:36,352 --> 00:00:41,728 ‫Apart from executing your code this cell can also be used for commenting 10 00:00:42,240 --> 00:00:44,288 ‫And it is really helpful 11 00:00:44,800 --> 00:00:46,592 ‫Make your code readable 12 00:00:46,848 --> 00:00:47,872 ‫And easy to follow. 13 00:00:49,920 --> 00:00:52,992 ‫To write the code you just have to click on this cell 14 00:00:53,760 --> 00:00:59,904 ‫And for example to add two numbers you can just write two plus two so this is where you will write your codes. 15 00:01:00,160 --> 00:01:02,720 ‫Execute this code just 16 00:01:03,232 --> 00:01:06,304 ‫Press control enter. 17 00:01:09,120 --> 00:01:15,264 ‫So you can write your codes in the cell and you will get the output just below it. 18 00:01:16,032 --> 00:01:17,312 ‫You can see 19 00:01:17,568 --> 00:01:20,128 ‫For input we have In 20 00:01:20,384 --> 00:01:25,760 ‫And for all the outputs we have out. 21 00:01:26,016 --> 00:01:28,832 ‫On the top you can see different menu items 22 00:01:30,624 --> 00:01:35,488 ‫File contains general options like saving printing 23 00:01:35,744 --> 00:01:36,768 ‫or renaming. 24 00:01:37,280 --> 00:01:41,632 ‫Edit contains ####### related options 25 00:01:41,888 --> 00:01:46,240 ‫Like cut cell ,copy cell, paste cell or Delete cell. 26 00:01:48,544 --> 00:01:51,872 ‫View contains interface related option 27 00:01:52,384 --> 00:01:56,736 ‫And insert contains option to insert new cells. 28 00:02:00,320 --> 00:02:04,416 ‫cells menu item contains execution related options 29 00:02:05,184 --> 00:02:09,536 ‫And as the name suggest help contains references and manuals 30 00:02:09,792 --> 00:02:11,840 ‫On how to use jupyter notebook. 31 00:02:12,096 --> 00:02:15,424 ‫You can also find the list of shortcuts from here, 32 00:02:22,848 --> 00:02:28,736 ‫Now most of the options we are going to use are also available in the form of buttons 33 00:02:29,248 --> 00:02:33,856 ‫So suppose if I want to rename this file as lecture 1 34 00:02:34,112 --> 00:02:35,392 ‫I will do that 35 00:02:35,648 --> 00:02:36,928 ‫By clicking on this 36 00:02:37,184 --> 00:02:41,280 ‫File name and title and just rename it to lecture 1. 37 00:02:49,216 --> 00:02:52,800 ‫To save this file we can click on the save button 38 00:02:55,360 --> 00:02:58,944 ‫It will automatically saves your file in your default directory. 39 00:03:00,736 --> 00:03:05,344 ‫Next time you open jupyter-notebook you will be able to see this file 40 00:03:05,600 --> 00:03:06,880 ‫In your default directory 41 00:03:07,392 --> 00:03:09,440 ‫From jupyter-notebook homepage 42 00:03:12,000 --> 00:03:15,328 ‫There are also buttons to cut copy paste 43 00:03:17,376 --> 00:03:20,704 ‫We also have a button to execute our quotes 44 00:03:21,472 --> 00:03:23,520 ‫So again if I 45 00:03:24,544 --> 00:03:26,080 ‫If I click on my cell 46 00:03:26,336 --> 00:03:28,896 ‫And click on Run It will execute the same. 47 00:03:31,200 --> 00:03:35,808 ‫Now you can see this drop down menu is saying code 48 00:03:36,064 --> 00:03:40,928 ‫This means the cell we have selected is containing a code 49 00:03:41,696 --> 00:03:47,328 ‫If I want it to contain a comment I can change it to either raw or markdown formatting. 50 00:03:49,376 --> 00:03:52,192 ‫If I change it to markdown or raw 51 00:03:52,448 --> 00:03:58,592 ‫our Python kernel will know that the cell the content of this particular cell is just for 52 00:03:58,848 --> 00:04:01,664 ‫For commenting and it will not execute it. 53 00:04:02,176 --> 00:04:07,552 ‫The presence of this feature make our code more readable and understandable. 54 00:04:08,320 --> 00:04:12,416 ‫So I will go ahead and change the format of this cell to MD. 55 00:04:12,672 --> 00:04:18,815 ‫Which is markdown you can see when I am changing my cell to markdown 56 00:04:19,071 --> 00:04:24,959 ‫The input symbol goes away there is no input symbol here. 57 00:04:25,215 --> 00:04:28,543 ‫Input symbols are present only in the front of codes. 58 00:04:29,567 --> 00:04:35,711 ‫I can write anything in this empty cell and Python treat this as a comment so let's go ahead and 59 00:04:35,967 --> 00:04:37,759 ‫And write this is a m d cell. 60 00:04:46,463 --> 00:04:51,327 ‫Markdown cells also supports markdown formatting 61 00:04:51,839 --> 00:04:55,935 ‫So if I want to give heading I can use pound symbol. 62 00:04:58,495 --> 00:05:00,799 ‫So will give a heading heading 1, 63 00:05:06,431 --> 00:05:08,223 ‫If I execute this 64 00:05:11,551 --> 00:05:17,695 ‫You can see since I use pound symbol in front of this heading one the front for heading 65 00:05:17,951 --> 00:05:20,511 ‫is the heading format. 66 00:05:22,559 --> 00:05:25,631 ‫We can also use multiple pound symbol 67 00:05:26,143 --> 00:05:27,423 ‫To change this size 68 00:05:27,679 --> 00:05:31,263 ‫So if I use two symbols for heading 2 69 00:05:37,151 --> 00:05:43,295 ‫You can see heading two is slightly smaller than heading one you can also 70 00:05:43,551 --> 00:05:49,695 ‫use 3 4 5 or 6 Pounds symbol to change the size of the settings. 71 00:05:52,767 --> 00:05:54,559 ‫You can also use astrick 72 00:05:54,815 --> 00:05:55,583 ‫Symbol 73 00:05:56,351 --> 00:05:57,631 ‫To give bullets. 74 00:05:59,423 --> 00:06:05,567 ‫So if I write astrick ,if I write bullet 75 00:06:05,823 --> 00:06:06,335 ‫Point 76 00:06:06,847 --> 00:06:11,455 ‫This asterisk symbol will be directly converted into a bullet. 77 00:06:20,671 --> 00:06:22,719 ‫If I execute it you can see 78 00:06:23,487 --> 00:06:29,631 ‫The astrick symbols are now converted into bullet and we are seeing all over points in proper bullet. 79 00:06:35,775 --> 00:06:40,127 ‫There are multiple features for editing markdown you can Google it 80 00:06:40,895 --> 00:06:44,479 ‫And if you want you can learn more about this formatting. 81 00:06:44,735 --> 00:06:50,879 ‫Again note that markdown are just for commenting your Python is not actually 82 00:06:51,135 --> 00:06:53,183 ‫Executing this cell. 83 00:06:55,487 --> 00:07:01,631 ‫The next cell format is raw,raw is similar to markdown but it does not support 84 00:07:01,887 --> 00:07:02,399 ‫Formatting. 85 00:07:03,423 --> 00:07:05,215 ‫So if you convert it to RAW 86 00:07:09,055 --> 00:07:11,871 ‫You convert it to raw it will remain like this 87 00:07:12,127 --> 00:07:15,967 ‫You will not be able to get formatting out of this cell. 88 00:07:16,479 --> 00:07:18,783 ‫Again raw is also for commenting 89 00:07:19,039 --> 00:07:21,087 ‫And Python will not execute it. 90 00:07:23,135 --> 00:07:26,975 ‫Code is the format in which we write our codes 91 00:07:28,511 --> 00:07:30,815 ‫And Python will only execute cells 92 00:07:31,071 --> 00:07:32,863 ‫that are marked as codes. 93 00:07:33,887 --> 00:07:36,447 ‫You can see the format for 94 00:07:36,703 --> 00:07:42,079 ‫This cell is code therefore I can use my codes in this cell 95 00:07:42,591 --> 00:07:44,383 ‫So if I write 2 + 2 96 00:07:45,407 --> 00:07:47,455 ‫I can execute it 97 00:07:47,711 --> 00:07:50,527 ‫Either by clicking this Run button 98 00:07:51,551 --> 00:07:55,135 ‫or by pressing the shortcut key that is control enter. 99 00:07:56,159 --> 00:07:56,671 ‫For now 100 00:07:57,439 --> 00:08:00,511 ‫I will click on this Run button 101 00:08:01,535 --> 00:08:03,839 ‫Similarly if I write 5 + 3 102 00:08:04,095 --> 00:08:10,239 ‫This time I will use control enter control enter is a shortcut to run. 103 00:08:10,495 --> 00:08:11,007 ‫The sun 104 00:08:11,263 --> 00:08:12,287 ‫Execute the same 105 00:08:15,359 --> 00:08:16,895 ‫But most of the time 106 00:08:17,151 --> 00:08:19,967 ‫We also want to enter a blank cell 107 00:08:20,479 --> 00:08:21,759 ‫beneath this cell 108 00:08:23,039 --> 00:08:24,831 ‫In that case I can use 109 00:08:25,087 --> 00:08:30,463 ‫Alt enter instead of control enter alt enter will execute the cell 110 00:08:30,975 --> 00:08:33,279 ‫Also it will insert a blank cell 111 00:08:34,303 --> 00:08:38,655 ‫Just below this cell so so write alt enter 112 00:08:39,935 --> 00:08:46,079 ‫It has executed the cell and it is inserted a new cell a new blank cell just below 113 00:08:46,335 --> 00:08:47,103 ‫this cell. 114 00:08:48,639 --> 00:08:51,199 ‫Another small point I want to tell you 115 00:08:51,711 --> 00:08:52,735 ‫About cell 116 00:08:52,991 --> 00:08:55,807 ‫Is editable and non editable mode. 117 00:08:57,599 --> 00:09:00,159 ‫So let's first insert a new cell 118 00:09:01,695 --> 00:09:03,999 ‫Now if you try to write anything 119 00:09:04,255 --> 00:09:05,791 ‫So if I write 120 00:09:06,047 --> 00:09:07,839 ‫Start Tech Academy 121 00:09:08,095 --> 00:09:09,375 ‫Nothing will happen 122 00:09:09,631 --> 00:09:10,143 ‫Because 123 00:09:10,399 --> 00:09:12,959 ‫This cells are not editable right now. 124 00:09:14,495 --> 00:09:15,775 ‫You can also notice 125 00:09:16,287 --> 00:09:21,151 ‫The colour of the cell is blue the border around this cell is blue 126 00:09:21,663 --> 00:09:24,479 ‫This suggest that the cell 127 00:09:24,735 --> 00:09:27,807 ‫Currently is an non editable format. 128 00:09:28,831 --> 00:09:30,111 ‫If you press enter 129 00:09:31,903 --> 00:09:34,463 ‫You can see the cursor 130 00:09:34,719 --> 00:09:38,559 ‫Inside the cell and now the blue colour has been changed to green colour 131 00:09:39,071 --> 00:09:40,607 ‫Now you can write anything. 132 00:09:41,119 --> 00:09:47,263 ‫If I write start Tech Academy you can see we are able to write this in 133 00:09:47,519 --> 00:09:49,055 ‫Inside a cell. 134 00:09:49,311 --> 00:09:51,871 ‫This mode is editable mode 135 00:09:52,127 --> 00:09:53,663 ‫If I press escape 136 00:09:55,967 --> 00:09:58,527 ‫You can see the colour has been changed to blue 137 00:09:58,783 --> 00:10:02,623 ‫And now we have entered a non editable mode. 138 00:10:02,879 --> 00:10:04,671 ‫In non editable mode 139 00:10:04,927 --> 00:10:05,951 ‫You can navigate 140 00:10:06,207 --> 00:10:11,583 ‫Two different cell and if you want to edit it you have to press enter 141 00:10:11,839 --> 00:10:17,983 ‫And the cursor will appear inside the cell and the cell boundary will change to green colour. 142 00:10:19,263 --> 00:10:21,055 ‫This two shortcuts 143 00:10:21,311 --> 00:10:24,639 ‫Of entering into editable and non editable mode 144 00:10:24,895 --> 00:10:26,175 ‫Are very important 145 00:10:26,687 --> 00:10:30,271 ‫And it will lay a foundation for other shortcuts as well. 146 00:10:31,039 --> 00:10:34,111 ‫So Suppose if you want to change the formatting 147 00:10:34,623 --> 00:10:36,159 ‫From code to markdown 148 00:10:36,927 --> 00:10:41,535 ‫You can put your cell into non editable mode so I will press escape 149 00:10:42,815 --> 00:10:45,887 ‫And then I will press M 150 00:10:47,679 --> 00:10:50,239 ‫M is a shortcut for markdown formatting 151 00:10:50,751 --> 00:10:53,055 ‫And you can see that 152 00:10:53,311 --> 00:10:59,455 ‫The cell type has been changed from court to markdown since right now I am in non editable mode 153 00:10:59,711 --> 00:11:01,759 ‫I can press y 154 00:11:02,015 --> 00:11:05,343 ‫To change the format of this cell to code. 155 00:11:07,903 --> 00:11:12,767 ‫Now to edit the code I just have to press enter to enter into editable mode. 156 00:11:13,535 --> 00:11:17,119 ‫Now again to go back to non editable 157 00:11:17,375 --> 00:11:18,911 ‫press escape 158 00:11:20,703 --> 00:11:23,775 ‫Now I can use shortcuts to change the cell format. 159 00:11:27,359 --> 00:11:30,943 ‫If I press r i can change the format of this cell to raw 160 00:11:31,711 --> 00:11:34,783 ‫And to switch back I just have to press y. 161 00:11:35,807 --> 00:11:39,391 ‫This shortcuts are very handy when you are using python 162 00:11:40,159 --> 00:11:43,231 ‫And it will save a lot of time for you 163 00:11:45,535 --> 00:11:46,303 ‫Again 164 00:11:46,559 --> 00:11:52,447 ‫Now the shortcut to insert new cell is just to enter into non editable mode 165 00:11:52,959 --> 00:11:55,519 ‫Press escape if you are in editable mode 166 00:11:55,775 --> 00:11:57,055 ‫and press A 167 00:11:59,359 --> 00:12:03,455 ‫A will insert a blank cell above your existing cell 168 00:12:04,479 --> 00:12:09,599 ‫And similarly B will enter a cell below your existing cell. 169 00:12:12,415 --> 00:12:16,511 ‫So I want you to remember this 6 shortcuts first is 170 00:12:16,767 --> 00:12:18,047 ‫enter 171 00:12:18,303 --> 00:12:20,607 ‫To enter into editable mode 172 00:12:20,863 --> 00:12:21,887 ‫of a cell 173 00:12:22,143 --> 00:12:23,935 ‫Second is escape 174 00:12:24,191 --> 00:12:27,775 ‫To go into the non editable mode of the cell. 175 00:12:29,055 --> 00:12:31,103 ‫Third is control enter 176 00:12:31,615 --> 00:12:32,895 ‫To executive 177 00:12:33,151 --> 00:12:34,431 ‫Selected cell. 178 00:12:34,943 --> 00:12:35,967 ‫Fourth one is 179 00:12:36,223 --> 00:12:37,247 ‫Alt enter 180 00:12:38,271 --> 00:12:43,903 ‫To execute your selected cell and enter a new blank cell below your cell. 181 00:12:45,183 --> 00:12:46,719 ‫The fifth one is 182 00:12:47,743 --> 00:12:48,255 ‫M 183 00:12:48,511 --> 00:12:54,655 ‫Use of m in non editable mode It will change the cell format from code to markdown 184 00:12:55,167 --> 00:12:57,215 ‫And the last one is y 185 00:12:58,495 --> 00:13:00,031 ‫In the non editable mode 186 00:13:00,287 --> 00:13:03,359 ‫If you press y it will change the format of your cell 187 00:13:03,871 --> 00:13:05,407 ‫From raw or markDown 188 00:13:05,663 --> 00:13:06,687 ‫To code format. 189 00:13:09,247 --> 00:13:10,527 ‫Similarly 190 00:13:11,039 --> 00:13:17,183 ‫There is one more shortcut if you want to delete your cell just press DD in non editable mode 191 00:13:17,951 --> 00:13:18,719 ‫It will delete 192 00:13:19,487 --> 00:13:25,631 ‫The selected cell.In the next lecture we'll cover some basic operations and python.