1 00:00:00,030 --> 00:00:04,770 Hey! Hi again! In the previous video I did a demonstration of the program so that 2 00:00:04,770 --> 00:00:10,530 you know how the program looks like and what is the output that the program 3 00:00:10,530 --> 00:00:14,730 generates, and also the interface of the program which is a command line 4 00:00:14,730 --> 00:00:20,039 interface. So you input the data through the interfaces, the user inputs the 5 00:00:20,039 --> 00:00:25,769 data through the command line interface and you get the output again from the 6 00:00:25,769 --> 00:00:32,250 command line. Now I have created a folder here somewhere and I have given it a name. 7 00:00:32,250 --> 00:00:36,480 You can give it any name that you want. And inside this folder I'll be putting 8 00:00:36,480 --> 00:00:42,450 all the files of this project so we're talking about the data files like data 9 00:00:42,450 --> 00:00:47,460 dot JSON, this is a file that contains the vocabulary where the program will 10 00:00:47,460 --> 00:00:53,969 extract, so will ask for a word and this file has the definition of that 11 00:00:53,969 --> 00:01:00,239 word. And also the dot py files will be put in here. So we know the output. Now we 12 00:01:00,239 --> 00:01:04,949 need to figure out the way how to go to that output and we will take the 13 00:01:04,949 --> 00:01:10,170 approach step by step which means that first we're going to develop a simple 14 00:01:10,170 --> 00:01:16,020 version of the program, you know just like give the program a word and the 15 00:01:16,020 --> 00:01:21,990 problem will return the definition of that word. But this will be very simple 16 00:01:21,990 --> 00:01:27,560 because you know the users sometimes they may pass a word that doesn't exist and 17 00:01:27,560 --> 00:01:34,829 as a programmer you need to count for that word, for that not existing word so 18 00:01:34,829 --> 00:01:39,000 instead of breaking, interrupting the program, showing an error to 19 00:01:39,000 --> 00:01:44,130 the user, you need to show a more user-friendly message to the user. And we 20 00:01:44,130 --> 00:01:48,000 will do that in the next videos but for now the very first thing we need to 21 00:01:48,000 --> 00:01:55,170 think about is the data, so I did some research on the web and I found this 22 00:01:55,170 --> 00:02:03,060 data set of words and definitions. Now this is around five megabytes of data so 23 00:02:03,060 --> 00:02:08,429 in Atom if it takes a while to open so I clicked it and I`m still waiting for it to 24 00:02:08,429 --> 00:02:13,500 open. Now it opened, so if you if your Atom freezes, then you can open this with 25 00:02:13,500 --> 00:02:21,690 more lightweight editor such as Notepad, or Nano on Mac, or Vim. So anyway this is 26 00:02:21,690 --> 00:02:28,560 a dot JSON file. So what is JSON? JSON is like a language. some say it's not a 27 00:02:28,560 --> 00:02:35,250 language, is just a set of rules how to format some data. So JSON follows this 28 00:02:35,250 --> 00:02:42,600 format. It starts with a curly bracket and then all we have is pairs of keys 29 00:02:42,600 --> 00:02:49,860 and values. So this is like a Python dictionary, so the key is separated by the 30 00:02:49,860 --> 00:02:56,430 value by a colon. In this particular case our values are inside square 31 00:02:56,430 --> 00:03:03,209 brackets which suggests that sometimes you know you may have more than one item 32 00:03:03,209 --> 00:03:13,190 inside the brackets. For instance let me search for the word ctrl F or command F 33 00:03:13,190 --> 00:03:21,150 rain so that will take us in here. First let me go to view and Toggle 34 00:03:21,150 --> 00:03:29,610 Soft Wrap. So what that will do is it will fit the text inside my screen so 35 00:03:29,610 --> 00:03:36,780 at the moment you see precipitation is outside of the screen bounds, so this 36 00:03:36,780 --> 00:03:41,550 also takes a while because we have quite a lot of data here. Now the data 37 00:03:41,550 --> 00:03:48,560 looks better so let me search for rain again. Find and so this is the key rain. 38 00:03:48,560 --> 00:03:55,530 Let's say the word rain and this is the definition of rain. In this case we have 39 00:03:55,530 --> 00:03:58,769 two definitions because you know for some words you may have more than one 40 00:03:58,769 --> 00:04:03,850 meaning. Or you have more than one form for 41 00:04:03,850 --> 00:04:10,270 instance. This is the noun, rain as a noun so it's a precipitation and this is 42 00:04:10,270 --> 00:04:15,220 the verb for rain. So when it rains to fall from the clouds 43 00:04:15,220 --> 00:04:22,080 in drops of water. So it's a verb and a noun and they are separated by a comma. 44 00:04:22,080 --> 00:04:28,420 So this is just like a Python dictionary And now we need to figure out how to 45 00:04:28,420 --> 00:04:34,720 load this data into Python because you know to access data from this file you 46 00:04:34,720 --> 00:04:40,330 first need to load it into Python as a specific Python data type and then 47 00:04:40,330 --> 00:04:44,980 you access data from that data type. So think for a moment what Python data type 48 00:04:44,980 --> 00:04:50,680 would be more appropriate for this JSON file. So think about that and I'll show 49 00:04:50,680 --> 00:04:54,000 just that in the next lecture. See you there!