WEBVTT 0 00:00.140 --> 00:06.650 Now, I've mentioned a lot about using code that other developers have written, and the most common 1 00:06.650 --> 00:10.280 way to do this is through using packages of code. 2 00:10.400 --> 00:16.250 In this lesson, I'll show you how to integrate an existing package of code into our project so that 3 00:16.250 --> 00:21.110 we can practice creating objects and working with attributes and methods. 4 00:21.200 --> 00:29.030 Now we've seen modules of code where each file that we create in our project is essentially a module 5 00:29.030 --> 00:30.100 in itself, 6 00:30.250 --> 00:37.810 but a package differs from a module in the sense that it's actually a whole bunch of code that other 7 00:37.810 --> 00:45.490 people have written. Lots and lots of files, all packaged together to achieve some sort of goal or purpose. 8 00:45.850 --> 00:53.830 Now, let's say that we want to create a table of Pokemon and their type, so we wanted some way of 9 00:53.830 --> 01:00.430 documenting that Pikachu is an Electric type, and maybe Squirtle is a Water type. 10 01:01.450 --> 01:07.450 Now, if we wanted to do that in ASCII so that we could print it in the console, well, then we would 11 01:07.450 --> 01:10.540 have to go about formatting it, and it'll be quite painful. 12 01:10.540 --> 01:14.440 So we might have to print some sort of pipe, 13 01:14.440 --> 01:18.180 and then maybe we would have the name of the field, 14 01:18.180 --> 01:26.040 so Pokemon name, and then maybe another pipe, and then we would have the name of the next column, which 15 01:26.040 --> 01:27.180 is their type. 16 01:27.390 --> 01:35.070 And then finally we would close that off, and then we would have to print some sort of horizontal 17 01:35.070 --> 01:40.890 line maybe like this, and so on and so forth, just to create this table. 18 01:40.890 --> 01:46.640 And it's quite difficult if you're not used to manipulating ASCII and visualizing it. 19 01:46.640 --> 01:49.280 I certainly am not up to this task. 20 01:49.490 --> 01:51.800 So what could we do instead? 21 01:51.830 --> 01:59.540 Well, we could search for a Package that other developers have created to achieve this goal, and the 22 01:59.540 --> 02:06.170 place that we would do that is somewhere called PyPI, which is the Python Package Index. 23 02:06.170 --> 02:13.040 And this is a bunch of software for the Python programming language that is developed and shared by 24 02:13.040 --> 02:14.210 the Python community. 25 02:14.210 --> 02:20.300 So we can see their source code, but more importantly, we can see how to implement the code and how 26 02:20.300 --> 02:22.490 to put it into our project. 27 02:23.030 --> 02:26.780 In here, I'm going to search for something called, prettytable. 28 02:27.440 --> 02:36.250 And this is a very simple library that is going to help us to display tables in an ASCII format. 29 02:36.460 --> 02:41.380 We can click on the project links to find out more about it, 30 02:41.380 --> 02:47.650 and this will take us to the Google Code Archive where the documentation is hosted. 31 02:47.680 --> 02:53.890 If you go to Wikis and go to tutorial, you'll see some documentation on how to use it. 32 02:53.910 --> 03:01.740 Now, this particular package is not as extensive as the Turtle graphics package, so there's actually 33 03:01.740 --> 03:06.960 not a lot of things you can do with it, but it's got more than we need for our use case. 34 03:07.590 --> 03:12.780 The first thing we have to do is to install this package into our project. 35 03:12.810 --> 03:19.280 Now, unlike the Turtle package, which is already pre-loaded with every copy of Python, in order to 36 03:19.280 --> 03:25.640 use the packages that you find in the Python Package Index, you actually have to install it. 37 03:25.640 --> 03:27.890 So here's how we do it in PyCharm. 38 03:27.890 --> 03:30.530 First go to the Preferences, 39 03:30.530 --> 03:32.930 so in windows I think it's under File, 40 03:32.930 --> 03:37.220 and then Preferences. On Mac, it's under PyCharm and then Preferences. 41 03:37.220 --> 03:43.190 And then here you'll see a whole bunch of things you can change including the Editor or Appearance, 42 03:43.190 --> 03:45.080 which we've already messed around with. 43 03:45.080 --> 03:47.750 But I want you to click on your project. 44 03:47.750 --> 03:50.870 So my project is called day-16-start. 45 03:50.870 --> 03:53.720 And then we're going to go into the project interpreter. 46 03:53.720 --> 04:02.330 And here we can click on the plus button to install any package that you find in the Python Package 47 04:02.330 --> 04:03.050 Index. 48 04:03.080 --> 04:04.910 Make a note of what it's called, 49 04:04.910 --> 04:07.150 so ours is called PrettyTable. 50 04:07.150 --> 04:10.870 And then we're going to search for it inside the available packages, 51 04:10.870 --> 04:14.740 and once we found it we're going to select it, and then click install. 52 04:16.300 --> 04:22.150 So now it's installed successfully, we can go ahead and close this down, and click Okay. 53 04:22.150 --> 04:27.010 And we can now access this package called PrettyTable in our code. 54 04:27.160 --> 04:32.550 Again I'm going to import it so I can say, import prettytable. 55 04:32.550 --> 04:36.690 And now I can use everything that's inside this package. 56 04:36.720 --> 04:43.800 Now if you want to see the source code you can actually right-click on it and select go to implementation. 57 04:43.800 --> 04:49.110 And this will take you to the Python file where this entire Pretty Table is implemented. 58 04:49.110 --> 04:53.520 So all of the code that they've written. It's a little bit daunting, 59 04:53.520 --> 04:59.130 and it's got a lot of code in it, but we don't have to worry about how the code is created and how 60 04:59.130 --> 04:59.970 it works. 61 04:59.970 --> 05:06.810 All we need to do is look at the documentation for this package and see how we can implement it into 62 05:06.810 --> 05:07.800 our project. 63 05:07.800 --> 05:13.740 Now, in the next lesson, we're going to get some practice constructing a PrettyTable object and, using 64 05:13.740 --> 05:17.610 the documentation to explore this object's attributes and methods. 65 05:17.610 --> 05:19.050 For all of that and more, 66 05:19.050 --> 05:19.860 I'll see you there.