WEBVTT 00:00.160 --> 00:01.200 Welcome back. 00:01.360 --> 00:03.280 We created load tasks. 00:03.280 --> 00:04.200 Function. 00:04.240 --> 00:06.400 Save tasks function. 00:06.400 --> 00:08.280 Add task function. 00:08.440 --> 00:10.360 View tasks function. 00:10.360 --> 00:13.280 And now let's test our application. 00:13.280 --> 00:17.520 So here running and testing our program. 00:17.560 --> 00:19.160 First of all print. 00:19.200 --> 00:24.600 Welcome to our to do list tasks equals to load tasks. 00:24.840 --> 00:35.080 Here we are calling the function load tasks and save it inside a variable called tasks or current tasks. 00:35.120 --> 00:36.720 Okay this is simple. 00:36.760 --> 00:47.280 Now we need to loop through the tasks and see if we need to add the task, view, task or exit. 00:47.280 --> 00:57.280 So we are going to allow the user to choice to choose between um between adding task, viewing task 00:57.280 --> 00:58.400 or exit. 00:58.400 --> 01:07.320 So the backslash which is a new line refers to new line add task number two. 01:07.520 --> 01:10.560 View tasks number three. 01:10.600 --> 01:11.320 Exit. 01:11.320 --> 01:14.680 Then we need to store it inside the choice. 01:14.800 --> 01:16.920 Choice equals to input. 01:16.960 --> 01:19.520 Choose an option for this. 01:19.560 --> 01:24.280 We are listening and waiting for the choice of the user. 01:24.320 --> 01:29.560 Here we need to use the if and else conditions. 01:29.560 --> 01:42.680 If choice equals to one, then what we need to do, we need to call add task and pass the current tasks. 01:42.720 --> 01:48.600 Also, we need to call the function save tasks and pass the current task. 01:48.760 --> 01:54.840 Thanks for the AI that generates and suggests some codes now. 01:55.080 --> 01:59.120 Elif choice equals to two. 01:59.360 --> 02:00.520 What we need to do. 02:00.680 --> 02:02.840 We need to view tasks. 02:02.840 --> 02:06.760 So here call the function view tasks. 02:06.800 --> 02:07.960 It's very simple. 02:08.000 --> 02:14.390 Pass the current task Also another choice is three for exit. 02:14.430 --> 02:19.630 Say goodbye and break because we don't need to loop anymore. 02:19.790 --> 02:27.270 Then here we need to print invalid choice if we if the user selects four for example. 02:27.270 --> 02:34.950 So here we have three options one for adding task, two for viewing tasks, three for ex. 02:35.030 --> 02:37.310 Let me run the cell. 02:37.310 --> 02:39.310 And here we have the output. 02:39.310 --> 02:41.430 Welcome to our to do list. 02:41.470 --> 02:44.510 Add task view tasks and exit. 02:44.750 --> 02:47.310 If we open this folder we have this text file. 02:47.310 --> 02:48.470 We can delete it. 02:48.470 --> 02:50.350 Delete file click okay. 02:50.350 --> 02:52.830 And here we don't have any files. 02:52.870 --> 02:55.270 Let me add that task. 02:55.270 --> 02:57.590 So number one enter. 02:57.790 --> 02:59.710 Enter a task please. 02:59.710 --> 03:05.990 For example by GPU 4060 for example Nvidia. 03:06.030 --> 03:06.550 Okay. 03:06.590 --> 03:08.830 Now let me open the folder. 03:08.830 --> 03:12.750 You can see tasks dot txt file is created. 03:12.790 --> 03:18.550 Open it and here we go by GPU 4060 Nvidia. 03:18.710 --> 03:19.150 Okay. 03:19.190 --> 03:20.550 This is the first line. 03:20.550 --> 03:29.710 Also the, the uh, if you if you notice that the program is looping and waiting for an option. 03:29.710 --> 03:37.350 So every the application will keep looping because I included inside a while loop. 03:37.630 --> 03:38.070 Okay. 03:38.110 --> 03:46.990 So this is an infinite loop until the user enters choice three which is exit okay. 03:47.270 --> 03:52.270 So if the user enters six we have an invalid choice. 03:52.390 --> 03:53.270 Try again. 03:53.590 --> 03:57.670 We have to add task view tasks and exit. 03:57.830 --> 04:04.350 Let me add another choice by hyper X microphone enter. 04:04.350 --> 04:05.190 And here we go. 04:05.270 --> 04:11.150 Now open tasks and here we go that tasks dot txt being updated. 04:11.190 --> 04:13.830 Now let me view the tasks. 04:13.830 --> 04:16.150 So enter number two enter. 04:16.310 --> 04:26.620 And here we go your tasks by GPU, Nvidia and by HyperX, and the application keeps running because 04:26.620 --> 04:28.060 we have an infinite loop. 04:28.300 --> 04:35.020 In order to break out of this cell and out of this application, we need to exit. 04:35.020 --> 04:36.860 So three here we go. 04:37.100 --> 04:39.580 The application is ended. 04:39.820 --> 04:40.380 Okay. 04:40.420 --> 04:41.140 So you see. 04:41.180 --> 04:41.740 Goodbye. 04:41.900 --> 04:44.540 This is our lovely application. 04:44.540 --> 04:53.780 This is a very important application that reviews the file input output, how to write and how to save 04:53.780 --> 04:55.100 data to a file. 04:55.140 --> 05:05.660 How to read from a file in Python, how to use conditional statements, how to use while loop and others. 05:05.860 --> 05:14.740 Okay, so this is a very important application that reviews all the previous concepts in Python. 05:14.740 --> 05:15.260 Okay. 05:15.540 --> 05:24.100 So we're going to use file input output as much in much in the next videos and next section.