WEBVTT 00:00.080 --> 00:01.580 It's time for a new activity. 00:01.580 --> 00:06.440 And in this activity you will practice with the Raspberry Pi camera module. 00:06.440 --> 00:07.880 So here's your challenge. 00:07.880 --> 00:10.220 You will need to take a series of photo. 00:10.220 --> 00:15.080 So you take one new photo every for example every five seconds. 00:15.080 --> 00:19.010 And you're going to store all those photos inside a folder okay. 00:19.040 --> 00:22.670 You continue to take photos as long as the program runs. 00:22.670 --> 00:25.940 And then when the user stops, the user is going to be you. 00:25.970 --> 00:32.330 When you stop the program with Ctrl C from the terminal, also from the shell, then you're going to 00:32.330 --> 00:34.610 stop taking photos so the program will exit. 00:34.610 --> 00:37.850 And here are a few tips to help you get started. 00:37.850 --> 00:45.680 So first of all, if you remember we have the OS module and you have a way to find if the path exists 00:45.680 --> 00:48.290 so that you already know, then if it doesn't exist. 00:48.290 --> 00:55.790 So if the folder doesn't exist, you're going to use OS dot mkdir and provide a folder name. 00:56.000 --> 00:58.430 So we will need to use this function here. 00:58.430 --> 01:01.070 For the folder name you can use whatever you want okay. 01:01.100 --> 01:03.800 For example activity ten or whatever. 01:03.800 --> 01:06.740 So if the folder doesn't exist you create it. 01:06.740 --> 01:12.920 And I'm not sure if I showed that to you before, but if you want to test that something is true, you 01:12.920 --> 01:14.180 do if okay. 01:14.210 --> 01:18.560 And then for example, something if this is true, you do something. 01:18.590 --> 01:25.280 For example, I put this block here, but if you want to execute this block, if this is false. 01:25.310 --> 01:29.000 What you can do is you can add a not keyword. 01:29.000 --> 01:35.840 So for example here, if you test if it doesn't exist, you can just test if it exists and put the not 01:35.840 --> 01:36.890 keyword in front. 01:36.890 --> 01:39.830 And it's going to return the opposite of true or false. 01:39.830 --> 01:42.410 So if it's true this is going to be false. 01:42.440 --> 01:42.830 Okay. 01:42.860 --> 01:46.130 If this is false then this is going to be true. 01:46.160 --> 01:46.670 All right. 01:46.670 --> 01:49.640 So here you will be able to use the Not keyword. 01:49.640 --> 01:53.540 So if not the folder exists then we create the folder. 01:53.570 --> 01:54.020 Great. 01:54.020 --> 01:56.570 And then you will initialize the camera. 01:56.570 --> 01:58.700 And you will need to take a photo. 01:58.700 --> 02:02.030 So with a loop probably a loop every five seconds. 02:02.030 --> 02:09.830 Now if you use the same file name every time, what you saw previously is that the new folder will replace 02:09.830 --> 02:10.940 the previous one. 02:10.940 --> 02:13.550 And what you want to do here instead is to take a new. 02:13.550 --> 02:16.850 So to create a new file name every time you take a new photo. 02:16.850 --> 02:25.250 So for example the first file would be image one dot jpg and then image two dot jpg, image three, 02:25.280 --> 02:26.360 etc.. 02:26.390 --> 02:26.810 All right. 02:26.810 --> 02:32.240 So in the loop you will need to find a way to create a new file name every time. 02:32.240 --> 02:34.400 So you will need to increment a number. 02:34.400 --> 02:37.610 And also to work with concatenation of strings. 02:37.610 --> 02:42.830 And then once again when the user presses Ctrl C the program is going to end. 02:42.860 --> 02:43.190 All right. 02:43.220 --> 02:45.800 Now that's enough information for you to get started. 02:45.800 --> 02:48.950 And I will see you in the next video for the solution.