1 1 00:00:00,830 --> 00:00:01,970 [Jose] Hi and welcome back. 2 2 00:00:01,970 --> 00:00:03,990 In this video, we are going to send emails 3 3 00:00:03,990 --> 00:00:05,770 from within our app. 4 4 00:00:05,770 --> 00:00:09,540 We're going to start by creating a new folder in our project 5 5 00:00:09,540 --> 00:00:11,992 and I'm going to call it libs. 6 6 00:00:11,992 --> 00:00:14,399 This stands for libraries. 7 7 00:00:14,399 --> 00:00:16,880 Here's where you'll normally put code 8 8 00:00:16,880 --> 00:00:21,510 that interacts with other services or other applications. 9 9 00:00:21,510 --> 00:00:24,140 Because we're going to be interacting with Mailgun, 10 10 00:00:24,140 --> 00:00:29,140 I'm going to put its code inside libs.mailgun.py. 11 11 00:00:29,540 --> 00:00:31,720 I've create a file called Mailgun. 12 12 00:00:31,720 --> 00:00:33,610 If we go back to Mailgun, 13 13 00:00:33,610 --> 00:00:37,023 you can see here that there is some Python sample code. 14 14 00:00:37,870 --> 00:00:40,521 Let's start by copying that. 15 15 00:00:40,521 --> 00:00:43,990 We're gonna try to make sure that our account is working 16 16 00:00:43,990 --> 00:00:45,453 before we do anything else. 17 17 00:00:46,566 --> 00:00:51,300 Copy that, come over here to this Mailgun.py file, 18 18 00:00:51,300 --> 00:00:52,233 and paste it in. 19 19 00:00:53,070 --> 00:00:54,940 Now you can see Python complains 20 20 00:00:54,940 --> 00:00:57,150 that there is an unresolved reference. 21 21 00:00:57,150 --> 00:01:01,403 We do have to import the requests module. 22 22 00:01:02,280 --> 00:01:04,950 Now if you don't have the requests module installed, 23 23 00:01:04,950 --> 00:01:08,200 open the PyCharm preferences, go to project interpreter, 24 24 00:01:08,200 --> 00:01:10,483 and then instal requests. 25 25 00:01:11,440 --> 00:01:12,811 Notice that I've got it here, 26 26 00:01:12,811 --> 00:01:15,140 but if it didn't, you could press the plus icon, 27 27 00:01:15,140 --> 00:01:17,513 find requests and instal it. 28 28 00:01:21,400 --> 00:01:24,470 Now what this is doing is it's sending a post request 29 29 00:01:24,470 --> 00:01:29,470 to this URL with this authentication information 30 30 00:01:29,660 --> 00:01:31,683 and this payload of data. 31 31 00:01:32,720 --> 00:01:35,560 With that information, we can go back to our account 32 32 00:01:35,560 --> 00:01:39,400 and fill in our details because these test details 33 33 00:01:39,400 --> 00:01:41,560 won't actually work, which is something 34 34 00:01:41,560 --> 00:01:43,900 that I have frequently complained about 35 35 00:01:43,900 --> 00:01:47,230 to Mailgun developers, but this won't actually work. 36 36 00:01:47,230 --> 00:01:51,560 It'll just give you a sample error, really. 37 37 00:01:51,560 --> 00:01:54,600 We do have to fill it in with our account details. 38 38 00:01:54,600 --> 00:01:57,070 If you go over to your domain information, 39 39 00:01:57,070 --> 00:01:59,480 make sure that you've selected your sandbox domain, 40 40 00:01:59,480 --> 00:02:02,110 I don't think you'll have any others just now, 41 41 00:02:02,110 --> 00:02:04,363 and copy your API key. 42 42 00:02:06,070 --> 00:02:08,640 And paste it in to the authentication field 43 43 00:02:09,870 --> 00:02:12,600 and replace the first part of the URL 44 44 00:02:14,530 --> 00:02:19,203 up until slash messages with the URL in your domain. 45 45 00:02:20,520 --> 00:02:22,910 From can be anything you like, 46 46 00:02:22,910 --> 00:02:27,910 but in this case, we're going to say do not reply. 47 47 00:02:29,110 --> 00:02:33,100 This is gonna be do not reply at 48 48 00:02:35,230 --> 00:02:36,550 all of this. 49 49 00:02:36,550 --> 00:02:38,030 We're just gonna do that to keep things safe. 50 50 00:02:38,030 --> 00:02:39,300 Instead of do not reply, 51 51 00:02:39,300 --> 00:02:42,230 I'm gonna call it pricing service in fact. 52 52 00:02:42,230 --> 00:02:43,710 Pricing service and the email address 53 53 00:02:43,710 --> 00:02:47,620 is do-not-reply@sandbox blah blah blah. 54 54 00:02:47,620 --> 00:02:49,690 Let's not forget the G at the end. 55 55 00:02:49,690 --> 00:02:51,523 To is going to be me. 56 56 00:02:52,700 --> 00:02:54,700 That is one of our email addresses. 57 57 00:02:54,700 --> 00:02:56,140 Subject is gonna be hello. 58 58 00:02:56,140 --> 00:02:58,713 The text, testing some Mailgun awesomeness. 59 59 00:03:02,159 --> 00:03:03,330 Let's run it. 60 60 00:03:03,330 --> 00:03:05,690 If you press play, remember you're gonna run 61 61 00:03:05,690 --> 00:03:08,970 this run configuration here, which is app.py. 62 62 00:03:08,970 --> 00:03:13,010 Do right-click Mailgun and run the Mailgun file. 63 63 00:03:13,010 --> 00:03:14,130 That's what we want to do. 64 64 00:03:14,130 --> 00:03:15,160 Finished. 65 65 00:03:15,160 --> 00:03:16,820 No information given to us. 66 66 00:03:16,820 --> 00:03:18,260 Now we just have to wait for an email, 67 67 00:03:18,260 --> 00:03:20,070 which I hope will arrive. 68 68 00:03:20,070 --> 00:03:22,430 But if you do want to see some information, 69 69 00:03:22,430 --> 00:03:25,550 you can, actually this one, actually do anything. 70 70 00:03:25,550 --> 00:03:28,290 The key, I may have noticed 71 71 00:03:29,190 --> 00:03:30,670 we didn't actually run the function. 72 72 00:03:30,670 --> 00:03:32,580 So, it won't have done anything. 73 73 00:03:32,580 --> 00:03:34,730 We can try again now actually running the function 74 74 00:03:34,730 --> 00:03:36,683 and printing its result. 75 75 00:03:39,010 --> 00:03:41,610 We have ourselves a response for 400. 76 76 00:03:41,610 --> 00:03:42,930 That means that it was an error 77 77 00:03:42,930 --> 00:03:47,720 because this is not one of my approved receivers. 78 78 00:03:47,720 --> 00:03:49,270 Let's try with a different one. 79 79 00:03:50,290 --> 00:03:51,880 Now we have response 200, 80 80 00:03:51,880 --> 00:03:55,220 which means all good, this is okay. 81 81 00:03:55,220 --> 00:03:57,720 I should receive an email momentarily, 82 82 00:03:57,720 --> 00:04:01,973 but this is the main part of sending email with Mailgun. 83 83 00:04:02,830 --> 00:04:04,670 We are going to make it a little bit nicer 84 84 00:04:04,670 --> 00:04:08,010 because we don't want to just send a simple message, 85 85 00:04:08,010 --> 00:04:12,500 we want to send a more complicated message I guess 86 86 00:04:12,500 --> 00:04:17,010 where we include some information about our pricing service 87 87 00:04:17,010 --> 00:04:21,260 and about the item that has just broken the limit 88 88 00:04:21,260 --> 00:04:22,260 that the user wants. 89 89 00:04:23,254 --> 00:04:24,563 We're going to import os. 90 90 00:04:25,910 --> 00:04:29,230 We're gonna import List from the typing module. 91 91 00:04:29,230 --> 00:04:31,010 You'll see why in just a moment. 92 92 00:04:31,010 --> 00:04:35,160 From requests, we're gonna import Response and post. 93 93 00:04:35,160 --> 00:04:37,970 We're gonna just remove this here and just use the post 94 94 00:04:37,970 --> 00:04:40,010 that has been imported from request. 95 95 00:04:40,010 --> 00:04:43,180 And then what we're gonna do is we're gonna create a class. 96 96 00:04:43,180 --> 00:04:45,990 We're gonna put this inside a Mailgun class 97 97 00:04:45,990 --> 00:04:48,940 so that interacting with the method is a little bit easier. 98 98 00:04:50,540 --> 00:04:52,563 We're gonna create a class method send_mail. 99 99 00:04:53,830 --> 00:04:56,820 This is gonna take in four things: 100 100 00:04:56,820 --> 00:04:59,620 an email, which is gonna be a list of strings, 101 101 00:04:59,620 --> 00:05:03,360 a subject, some text, and some HTML. 102 102 00:05:03,360 --> 00:05:06,203 The HTML really is gonna be optional for the most part. 103 103 00:05:07,060 --> 00:05:09,890 This is gonna return a response. 104 104 00:05:09,890 --> 00:05:12,750 Notice that the response that is being returned 105 105 00:05:12,750 --> 00:05:14,790 is a requests object 106 106 00:05:14,790 --> 00:05:16,820 so something from this requests library. 107 107 00:05:16,820 --> 00:05:17,700 That's totally fine. 108 108 00:05:17,700 --> 00:05:18,543 You can do that. 109 109 00:05:20,690 --> 00:05:23,770 Next, we're going to grab all of this 110 110 00:05:24,650 --> 00:05:29,650 and say response equal the result of calling all of that. 111 111 00:05:30,210 --> 00:05:31,940 Now we can delete this thing here 112 112 00:05:31,940 --> 00:05:33,490 and we can delete that as well. 113 113 00:05:36,580 --> 00:05:41,350 Now here we may want to reformat this a little bit. 114 114 00:05:41,350 --> 00:05:43,900 So, you can select it all and then go to code 115 115 00:05:43,900 --> 00:05:46,100 and press reformat code. 116 116 00:05:46,100 --> 00:05:48,110 That will reformat it for you. 117 117 00:05:48,110 --> 00:05:49,060 If you don't like the format, 118 118 00:05:49,060 --> 00:05:51,930 you can play around with it a little bit as well. 119 119 00:05:51,930 --> 00:05:55,443 Now that we've got our response, we're gonna say 120 120 00:05:55,443 --> 00:06:00,443 if the response status code is not 200, 121 121 00:06:04,200 --> 00:06:08,290 then we will raise a Mailgun exception. 122 122 00:06:08,290 --> 00:06:12,323 We're gonna say an error occurred while sending email. 123 123 00:06:14,200 --> 00:06:16,260 Otherwise we're gonna return response. 124 124 00:06:16,260 --> 00:06:18,270 Now as you may have guessed, Mailgun exception 125 125 00:06:18,270 --> 00:06:19,353 doesn't yet exist. 126 126 00:06:25,260 --> 00:06:26,960 But now it does. 127 127 00:06:26,960 --> 00:06:27,910 There we have that. 128 128 00:06:29,010 --> 00:06:31,380 Next, we have to make sure that we are using 129 129 00:06:31,380 --> 00:06:33,347 the arguments to our send_mail. 130 130 00:06:34,430 --> 00:06:37,410 Instead of to and hard-coding an email address, 131 131 00:06:37,410 --> 00:06:39,440 we can use email. 132 132 00:06:39,440 --> 00:06:42,850 Instead of subject hello, we can use subject. 133 133 00:06:42,850 --> 00:06:45,480 Instead of text, we can use text. 134 134 00:06:45,480 --> 00:06:48,213 The final HTML argument is just HTML. 135 135 00:06:49,073 --> 00:06:52,810 That can include some option HTML on the email, 136 136 00:06:52,810 --> 00:06:55,210 which will be shown instead of the text 137 137 00:06:55,210 --> 00:06:57,510 if the recipient's viewer, 138 138 00:06:57,510 --> 00:07:01,273 HTML viewer or email viewer accepts HTML. 139 139 00:07:03,270 --> 00:07:04,103 That's about it. 140 140 00:07:04,103 --> 00:07:06,520 This is everything we need to actually send email. 141 141 00:07:06,520 --> 00:07:07,930 We're gonna do a couple more things 142 142 00:07:07,930 --> 00:07:09,960 just to make it more resilient. 143 143 00:07:09,960 --> 00:07:14,903 We're going to read the API key from os.environ. 144 144 00:07:15,810 --> 00:07:20,540 We're gonna see MAILGUN_API_KEY defaulting to none 145 145 00:07:20,540 --> 00:07:24,610 and MAILGUN_DOMAIN which is also gonna come 146 146 00:07:24,610 --> 00:07:26,523 from the MAILGUN. 147 147 00:07:29,060 --> 00:07:29,893 There we go. 148 148 00:07:32,380 --> 00:07:36,183 Then we're gonna hard-code from title to be pricing service 149 149 00:07:37,762 --> 00:07:42,017 and the from email to be this one. 150 150 00:07:46,320 --> 00:07:47,260 Why do this? 151 151 00:07:47,260 --> 00:07:49,660 It just makes things a little bit more readable. 152 152 00:07:50,570 --> 00:07:54,350 Next, the API key is going to be replacing that 153 153 00:07:54,350 --> 00:07:58,180 and the domain is going to be replacing that. 154 154 00:08:02,360 --> 00:08:04,830 But we're gonna use an f-string for it. 155 155 00:08:04,830 --> 00:08:07,573 Now these do require cls in front of them. 156 156 00:08:10,210 --> 00:08:12,370 In here, we're also gonna put an f-string. 157 157 00:08:12,370 --> 00:08:14,917 Instead of this, we're gonna have FROM_TITLE. 158 158 00:08:17,490 --> 00:08:19,923 Instead of this, 159 159 00:08:23,560 --> 00:08:24,970 we're gonna have FROM_EMAIL. 160 160 00:08:24,970 --> 00:08:25,803 There we go. 161 161 00:08:25,803 --> 00:08:27,160 That's just a little bit cleaner. 162 162 00:08:27,160 --> 00:08:28,850 The constants that are never gonna change, 163 163 00:08:28,850 --> 00:08:31,380 it extracted it to the top of the class. 164 164 00:08:31,380 --> 00:08:33,970 Because they don't need to be inside self, 165 165 00:08:33,970 --> 00:08:36,250 we can just put them as class variables 166 166 00:08:36,250 --> 00:08:37,800 and this can be a class method. 167 167 00:08:38,830 --> 00:08:40,300 The next thing is to make sure 168 168 00:08:40,300 --> 00:08:43,663 that the API key and the domain do exist. 169 169 00:08:44,744 --> 00:08:48,379 If cls.MAILGUN_API_KEY is none, 170 170 00:08:48,379 --> 00:08:51,670 then we're gonna raise a Mailgun exception 171 171 00:08:51,670 --> 00:08:53,150 and we're gonna say something 172 172 00:08:53,150 --> 00:08:57,063 like failed to load Mailgun API key. 173 173 00:08:59,160 --> 00:09:02,210 If the MAILGUN_DOMAIN is none, 174 174 00:09:02,210 --> 00:09:04,940 we're gonna raise a Mailgun exception 175 175 00:09:04,940 --> 00:09:08,913 saying something like failed to load Mailgun domain. 176 176 00:09:10,900 --> 00:09:12,630 If you did want some more information 177 177 00:09:12,630 --> 00:09:15,380 regarding the problem, while you develop, 178 178 00:09:15,380 --> 00:09:17,980 you can do something like print response.json. 179 179 00:09:18,920 --> 00:09:19,960 That'll give you a bit more information 180 180 00:09:19,960 --> 00:09:21,210 about what's going wrong. 181 181 00:09:22,100 --> 00:09:23,166 All right. 182 182 00:09:23,166 --> 00:09:26,567 Let's try out this by typing Mailgun.send_mail. 183 183 00:09:28,660 --> 00:09:31,323 We're gonna send it to once again me. 184 184 00:09:33,000 --> 00:09:36,970 The subject is gonna be that. 185 185 00:09:36,970 --> 00:09:39,923 The text is gonna be that. 186 186 00:09:41,080 --> 00:09:43,860 The HTML is gonna be 187 187 00:09:48,400 --> 00:09:49,233 that. 188 188 00:09:51,040 --> 00:09:53,210 Once again, we can run this file 189 189 00:09:54,600 --> 00:09:57,730 and then we get our first exception, which is excellent, 190 190 00:09:57,730 --> 00:10:00,053 failed to load Mailgun API key. 191 191 00:10:00,930 --> 00:10:04,120 That means that we don't have an environment variable 192 192 00:10:04,120 --> 00:10:07,073 called MAILGUN_API_KEY currently set. 193 193 00:10:08,040 --> 00:10:10,850 We can go into our dotenv 194 194 00:10:10,850 --> 00:10:13,773 and define them here, MAILGUN_API_KEY, MAILGUN_DOMAIN. 195 195 00:10:17,570 --> 00:10:18,403 Okay. 196 196 00:10:18,403 --> 00:10:19,236 Those two there. 197 197 00:10:20,590 --> 00:10:22,710 Once again, we go back here. 198 198 00:10:22,710 --> 00:10:23,893 We copy them. 199 199 00:10:30,280 --> 00:10:31,823 Now we try to run it again. 200 200 00:10:33,100 --> 00:10:35,423 But alas, we get the same error. 201 201 00:10:37,260 --> 00:10:38,787 Why? 202 202 00:10:38,787 --> 00:10:40,650 Remember I mentioned earlier on 203 203 00:10:40,650 --> 00:10:43,310 when we first created our dotenv files 204 204 00:10:43,310 --> 00:10:47,000 that Flask is the one that automatically loads them 205 205 00:10:47,000 --> 00:10:49,893 if you have the library Python dotenv installed. 206 206 00:10:50,790 --> 00:10:53,685 But we are running mailgun.py, 207 207 00:10:53,685 --> 00:10:55,380 which has actually nothing to do with Flask. 208 208 00:10:55,380 --> 00:10:57,930 There is no Flask anywhere here. 209 209 00:10:57,930 --> 00:11:01,570 There's no Flask at being created or anything like that. 210 210 00:11:01,570 --> 00:11:04,360 So, you cannot run this file like that 211 211 00:11:04,360 --> 00:11:06,350 unless you first load the MAILGUN_API_KEY 212 212 00:11:06,350 --> 00:11:10,700 and MAILGUN_DOMAIN into your environment variables 213 213 00:11:10,700 --> 00:11:12,743 or somehow load the dotenv file. 214 214 00:11:14,340 --> 00:11:16,120 We can do this just now. 215 215 00:11:16,120 --> 00:11:20,230 But what we can do is we can do a little pack of a test. 216 216 00:11:20,230 --> 00:11:22,630 We can go into app.py 217 217 00:11:22,630 --> 00:11:26,893 and say from libs.mailgun import Mailgun. 218 218 00:11:26,893 --> 00:11:31,700 And then just down here somewhere, we can type this out. 219 219 00:11:31,700 --> 00:11:33,690 Maybe we can even print the result 220 220 00:11:33,690 --> 00:11:36,290 to make sure that it is a response 200. 221 221 00:11:36,290 --> 00:11:38,903 Now we can right-click app.py and run it, 222 222 00:11:40,590 --> 00:11:42,550 but it's happening again. 223 223 00:11:42,550 --> 00:11:44,080 We get the Mailgun exception: 224 224 00:11:44,080 --> 00:11:47,120 failed to load Mailgun API key. 225 225 00:11:47,120 --> 00:11:50,650 The reason for that is that Flask actually loads this file 226 226 00:11:50,650 --> 00:11:54,598 or Python loads this file before Flask runs. 227 227 00:11:54,598 --> 00:11:59,210 It's also when Flask runs that it loads the dotenv file. 228 228 00:11:59,210 --> 00:12:01,400 The first time that the file loads, 229 229 00:12:01,400 --> 00:12:04,024 we don't have the dotenv file loaded. 230 230 00:12:04,024 --> 00:12:07,570 Therefore, this cannot run. 231 231 00:12:07,570 --> 00:12:09,010 You can verify that very easily 232 232 00:12:09,010 --> 00:12:12,910 by doing something like print os.environ 233 233 00:12:12,910 --> 00:12:14,050 and then running it again. 234 234 00:12:14,050 --> 00:12:16,060 You'll see that it gets printed out. 235 235 00:12:16,060 --> 00:12:18,290 Oh you do have to remove this of course 236 236 00:12:18,290 --> 00:12:19,770 because it causes an error. 237 237 00:12:19,770 --> 00:12:22,060 You'll see it gets printed out twice. 238 238 00:12:22,060 --> 00:12:24,860 The first time when the file gets imported 239 239 00:12:24,860 --> 00:12:27,224 and then when Flask runs. 240 240 00:12:27,224 --> 00:12:30,840 So, we cannot put it there. 241 241 00:12:30,840 --> 00:12:32,870 Or can we? 242 242 00:12:32,870 --> 00:12:35,960 The thing is, by the time that we send mail, 243 243 00:12:35,960 --> 00:12:39,200 the environment variables have already been used 244 244 00:12:39,200 --> 00:12:41,760 or you will be able to access them. 245 245 00:12:41,760 --> 00:12:44,153 That's because when the class loads, 246 246 00:12:45,270 --> 00:12:48,163 i.e., when the file gets imported, 247 247 00:12:49,110 --> 00:12:51,430 that is when this gets calculated. 248 248 00:12:51,430 --> 00:12:55,240 If we calculate this when the method gets used, 249 249 00:12:55,240 --> 00:12:57,053 then we will have a chance. 250 250 00:12:57,965 --> 00:13:00,260 Actually this optimization here 251 251 00:13:00,260 --> 00:13:05,260 of moving stuff into constants may be a bit of an issue. 252 252 00:13:06,890 --> 00:13:10,460 We are going to cut those and put them in here 253 253 00:13:18,600 --> 00:13:19,433 just like that. 254 254 00:13:20,730 --> 00:13:23,493 Then if we go back to app.py, we can try again. 255 255 00:13:26,480 --> 00:13:28,568 Same problem happens. 256 256 00:13:28,568 --> 00:13:32,170 But again that's because this runs 257 257 00:13:32,170 --> 00:13:35,040 before the dotenv is loaded. 258 258 00:13:35,040 --> 00:13:38,290 We've got an easier way to check that that is the problem 259 259 00:13:38,290 --> 00:13:41,370 if we load the dotenv ourselves 260 260 00:13:41,370 --> 00:13:45,453 just by doing load dotenv from the dotenv package. 261 261 00:13:48,970 --> 00:13:51,690 There you have it, a response 200. 262 262 00:13:51,690 --> 00:13:55,150 Do note that putting this here means it gets sent twice 263 263 00:13:55,150 --> 00:13:57,620 because the first time when this all loads, 264 264 00:13:57,620 --> 00:14:01,110 the second time when Flask runs through it. 265 265 00:14:01,110 --> 00:14:02,930 So, this is not what we want. 266 266 00:14:02,930 --> 00:14:06,030 But that was the cause of the problem. 267 267 00:14:06,030 --> 00:14:10,050 We're gonna need to do this later on in our alert_updater. 268 268 00:14:11,619 --> 00:14:14,837 Let's go over to our alert model. 269 269 00:14:16,730 --> 00:14:20,420 What we're gonna do is we're gonna send the user an email 270 270 00:14:20,420 --> 00:14:22,330 when the price has been reached. 271 271 00:14:22,330 --> 00:14:24,800 So, we're gonna do send_mail. 272 272 00:14:24,800 --> 00:14:28,040 Here, we're gonna put some slightly nicer text, of course. 273 273 00:14:28,040 --> 00:14:30,130 I've gone ahead and typed out the text for you 274 274 00:14:30,130 --> 00:14:32,240 just so you don't have to watch do it. 275 275 00:14:32,240 --> 00:14:34,760 We're gonna notification for self.name, 276 276 00:14:34,760 --> 00:14:36,140 which is the alert's name, 277 277 00:14:36,140 --> 00:14:38,450 and then a nice string that says your alert has reached 278 278 00:14:38,450 --> 00:14:41,950 the price under the limit, the latest price is blah, 279 279 00:14:41,950 --> 00:14:42,960 whatever that is, 280 280 00:14:42,960 --> 00:14:44,940 and then go this address to check your item. 281 281 00:14:44,940 --> 00:14:46,190 Because we're sending an email, 282 282 00:14:46,190 --> 00:14:48,390 we can now include the item URL and they can click it 283 283 00:14:48,390 --> 00:14:51,400 and they can go straight to buying the item that they want. 284 284 00:14:51,400 --> 00:14:53,380 In HTML terms, it's more or less the same, 285 285 00:14:53,380 --> 00:14:56,240 but now we do have to include the paragraph tags. 286 286 00:14:56,240 --> 00:14:58,090 But inside the last paragraph, 287 287 00:14:58,090 --> 00:15:01,670 we can actually do a click here to purchase your item 288 288 00:15:01,670 --> 00:15:05,343 because we can include anchor tags or a tags in there. 289 289 00:15:06,930 --> 00:15:09,110 We do have to import the library. 290 290 00:15:09,110 --> 00:15:12,763 From libs.mailgun, import the Mailgun library. 291 291 00:15:14,890 --> 00:15:17,155 Let me stop that app there. 292 292 00:15:17,155 --> 00:15:19,500 That's pretty much everything we have to do. 293 293 00:15:19,500 --> 00:15:23,310 Now whenever we run through the alert_updater, 294 294 00:15:23,310 --> 00:15:27,133 this will automatically send emails if the price is reached. 295 295 00:15:28,150 --> 00:15:31,300 Of course, the alert_updater does not have the API key. 296 296 00:15:31,300 --> 00:15:33,110 So, if you run alert_updater, 297 297 00:15:33,110 --> 00:15:34,640 you'll get the same error as before, 298 298 00:15:34,640 --> 00:15:37,080 failed to load Mailgun API key. 299 299 00:15:37,080 --> 00:15:41,130 You do have to do from dotenv import load_dotenv 300 300 00:15:41,130 --> 00:15:44,890 and load that manually because Flask is not working here. 301 301 00:15:44,890 --> 00:15:47,940 So, it doesn't load the dotenv for us. 302 302 00:15:47,940 --> 00:15:50,860 But if you do it like this, then it does. 303 303 00:15:50,860 --> 00:15:54,950 However, you'll get errors because not all users 304 304 00:15:54,950 --> 00:15:58,756 that have alerts are my authorised recipients. 305 305 00:15:58,756 --> 00:16:00,250 That's why the errors happen. 306 306 00:16:00,250 --> 00:16:02,130 But if you do have your authorised recipients 307 307 00:16:02,130 --> 00:16:04,963 creating alerts, you'll see that this all works. 308 308 00:16:06,710 --> 00:16:09,470 This is how to send email from Python. 309 309 00:16:09,470 --> 00:16:12,370 We've created a library that makes it even easier 310 310 00:16:12,370 --> 00:16:14,540 just by taking in a bunch of parameters 311 311 00:16:14,540 --> 00:16:17,890 and sending an email using Mailgun. 312 312 00:16:17,890 --> 00:16:22,644 Inside this library, we are using environment variables, 313 313 00:16:22,644 --> 00:16:26,590 which we are checking whenever we send email, 314 314 00:16:26,590 --> 00:16:30,445 and then we're just making a post request to Mailgun 315 315 00:16:30,445 --> 00:16:33,063 and finally we're doing some error checking as well. 316 316 00:16:34,720 --> 00:16:37,620 Do note that this is just how Mailgun works. 317 317 00:16:37,620 --> 00:16:39,420 If you want to use a different service, 318 318 00:16:39,420 --> 00:16:42,010 the API or the place that you make requests to 319 319 00:16:42,010 --> 00:16:43,140 may be slightly different, 320 320 00:16:43,140 --> 00:16:45,460 the data you have to send may be slightly different. 321 321 00:16:45,460 --> 00:16:48,843 But generally, it's going to be more or less like this. 322 322 00:16:49,890 --> 00:16:51,210 I hope you've learned something. 323 323 00:16:51,210 --> 00:16:52,823 I'll see you on the next video.