WEBVTT 00:00.440 --> 00:02.640 And a very warm welcome to cursor. 00:02.680 --> 00:03.320 Here we are. 00:03.360 --> 00:05.040 We are in week four. 00:05.080 --> 00:09.480 Landgraf, we're going to lab two, which is the lab for day three. 00:09.520 --> 00:10.280 It's confusing. 00:10.520 --> 00:14.080 Uh, so we're going to start with some imports as we do. 00:14.120 --> 00:18.280 And we are also going to do the low dot env that always needs to be done. 00:18.560 --> 00:21.200 And we are now going to go and set up Lang Smith. 00:21.200 --> 00:22.880 So there's a link to Lang Smith here. 00:22.880 --> 00:25.000 When you follow this link you'll get to their website. 00:25.000 --> 00:27.560 And the first thing you'll need to do is create an account. 00:27.800 --> 00:29.520 Uh, and it's free. 00:29.560 --> 00:33.440 It's free as long as you stay within some very high number, which we definitely will. 00:33.720 --> 00:35.400 Uh, so you can set that up. 00:35.400 --> 00:38.840 And when you come in, you're going to get this sort of dashboard a bit like this, except it will be 00:38.840 --> 00:39.360 empty. 00:39.520 --> 00:43.880 And the first thing to do is to press the setup tracing button right here. 00:43.880 --> 00:45.200 And this is going to fly up. 00:45.360 --> 00:48.880 You have to generate an API key so that you've got an API key. 00:49.000 --> 00:53.160 And as soon as you press that it will then fill this in down here. 00:53.440 --> 00:59.040 And you just simply then want to copy that to your clipboard, all of your, uh, fields, all of the 00:59.080 --> 01:01.320 key variables that you'll see here. 01:01.560 --> 01:04.720 Um, but just don't obviously don't take the OpenAI API key as well. 01:04.720 --> 01:06.840 You don't need that, But you need this. 01:07.080 --> 01:12.240 And then you will it will actually populate that API key with whatever you generate right here, which 01:12.240 --> 01:13.000 is great. 01:13.240 --> 01:21.280 And then you will go into, uh, back back here into your EMV file, which is just there, and you will 01:21.280 --> 01:26.560 add this in to your EMV file so that we have these variables set. 01:26.600 --> 01:31.240 And then once you've done that come back and run load dot env again so that they load in. 01:31.280 --> 01:32.800 Maybe I should have done that in the other order. 01:33.440 --> 01:34.280 So that's great. 01:34.280 --> 01:37.880 Then you have langsamt configured and you'll be able to see things. 01:38.080 --> 01:42.960 Now before we, uh, go further, I will just just talk through a few of the things we can expect to 01:42.960 --> 01:43.360 see. 01:43.640 --> 01:48.000 Um, so I called the project mastering agents, but you can call it whatever you want. 01:48.040 --> 01:48.560 Of course. 01:48.880 --> 01:52.480 Um, and you can see in here there's there's lots of stuff that I've been doing. 01:52.600 --> 01:58.200 You'll see that it for every time that I've invoked Landgraf, I get some sort of a of an entry here. 01:58.200 --> 02:00.480 I get the input and the output. 02:00.520 --> 02:03.480 If there's an error, which I had a couple of errors, then we will see them. 02:03.680 --> 02:05.520 It tells you when it happened. 02:05.560 --> 02:08.040 It tells you the latency, which is very helpful. 02:08.040 --> 02:11.530 And there's a bunch of other useful stuff here too, which we don't often get to see. 02:11.770 --> 02:17.010 The cost in this column is telling us how much this cost us to make this call to OpenAI. 02:17.290 --> 02:23.570 And for those people that are concerned about about API costs, do have a look at how insanely small 02:23.570 --> 02:24.330 these numbers are. 02:24.370 --> 02:25.930 It just really brings it to life. 02:26.090 --> 02:31.450 I realize that the main problem people have is with the upfront $5 you have to put in at the beginning, 02:31.450 --> 02:36.850 but I hope that you see that that until you get to such point as you are scaling, we are talking about 02:36.890 --> 02:42.570 not just fractions of a cent, but fractions of fractions of a cent for most of these. 02:42.850 --> 02:46.210 Um, it also tells you the number of tokens, which is helpful to know. 02:46.570 --> 02:51.490 I'm not sure the zeros were because I had some bug that I luckily then fixed. 02:51.650 --> 02:55.890 Uh, so you get to see a bunch of stuff in here and this is going to be useful. 02:55.890 --> 03:00.650 And when we actually have things to to look at, we will come back and take a look at that. 03:00.930 --> 03:01.490 Okay. 03:01.770 --> 03:02.570 Onwards. 03:02.810 --> 03:03.570 All right. 03:04.050 --> 03:09.210 So I found a useful function that's in the long chain community folder. 03:09.490 --> 03:16.090 Uh and it's called Google Sherpa API wrapper, which means that it's a nice little convenient wrapper 03:16.130 --> 03:22.450 around the same thing that we set up before the Sherpa API, where we already have the API key in our 03:22.450 --> 03:24.970 env file, which is convenient to use. 03:25.290 --> 03:29.210 And so we can create an instance of this thing Google soap API wrapper. 03:29.210 --> 03:33.610 And we can call Sherpa with something like what's the capital of France? 03:33.650 --> 03:36.050 And if we do this, then it will think for a moment. 03:36.050 --> 03:41.850 And indeed we get Paris is the capital and largest city of France, and with some stuff about it, from 03:41.850 --> 03:44.810 doing an internet search on this, which is great. 03:44.810 --> 03:50.530 And again, this is something that's part of what's free and included in the plan up until some several 03:50.570 --> 03:51.490 thousand calls. 03:51.490 --> 03:55.530 I think unlike OpenAI, which is charging us two and a half cents for each one. 03:56.410 --> 03:59.170 So that is, uh, that is good. 03:59.650 --> 04:06.090 Now, this is showing you some of the nice stuff that's actually in Long Chain rather than Landgraf, 04:06.090 --> 04:07.530 but Landgraf uses it to. 04:07.570 --> 04:11.650 I mentioned to you that Long chain already does sort of simple agent interactions. 04:11.650 --> 04:15.050 It already gives some some wrapper code, some abstraction code. 04:15.090 --> 04:16.690 And here is here is one of them. 04:16.690 --> 04:19.890 I kept the import here so we could see that it's from, from long chains. 04:20.050 --> 04:20.810 Long chain. 04:21.130 --> 04:21.570 So? 04:21.570 --> 04:27.850 So you can say that, uh, you can wrap a function like this with a tool object. 04:27.850 --> 04:32.330 You give it a name like search a function serpent run. 04:32.330 --> 04:35.730 That's what it will actually do when it needs to call this tool. 04:35.770 --> 04:43.770 And a description is what will be will be called in order to, um, when, when building the JSON around 04:43.770 --> 04:44.410 this tool. 04:44.770 --> 04:50.690 Uh, so that's wrapped it in a tool object, a long chain tool object. 04:50.690 --> 04:55.970 And as you can probably guess, this is going to take away all of the gumph about building that JSON 04:55.970 --> 04:59.130 object with all the stuff and the properties and everything else. 04:59.130 --> 05:04.010 It's going to take care of all of that for us, so we can now try out the same, the same question, 05:04.010 --> 05:10.410 what's the capital of France which we can do using tool search dot invoke the long chain way we are 05:10.410 --> 05:12.290 calling this tool and there we go. 05:12.330 --> 05:15.770 We get an answer of the capital of France, same thing. 05:15.770 --> 05:18.610 But now we're doing it by calling invoke. 05:18.850 --> 05:19.370 Okay. 05:19.410 --> 05:23.530 And now let's just show you what it's like to build a tool from scratch ourselves. 05:23.530 --> 05:24.610 It's super easy. 05:24.930 --> 05:28.660 Uh, so we'll use the same old thing that we like to do because it's nice. 05:28.700 --> 05:30.180 It's so tangible. 05:30.420 --> 05:36.420 Uh, using pushover, this is the same kind of function that is able to send a push notification to 05:36.460 --> 05:36.940 me. 05:36.940 --> 05:42.620 So we give it the usual docstring, we give it, uh, the information about it. 05:42.860 --> 05:45.100 Um, and, uh, here we go. 05:45.140 --> 05:45.980 That's that. 05:46.260 --> 05:51.700 I put that into a tool again, the same construct, the long chain construct. 05:51.740 --> 05:53.820 The name is send push notification. 05:53.820 --> 05:56.260 The function is push and that's a description. 05:56.460 --> 06:01.460 And now I can then call tool push invoke with me. 06:04.740 --> 06:05.300 There we go. 06:05.340 --> 06:05.700 Oh, yeah. 06:05.740 --> 06:06.020 Hello. 06:06.060 --> 06:06.340 Me. 06:06.700 --> 06:10.340 Uh, so now we have made, uh, a tool ourselves. 06:10.380 --> 06:11.540 A custom tool. 06:11.540 --> 06:16.980 So now we have an off the shelf tool for searching using the same API. 06:17.220 --> 06:22.220 And we have a custom tool for sending a push notification using the nifty pushover package. 06:22.540 --> 06:22.980 Okay. 06:23.020 --> 06:27.220 And we can put both of these tools in a list of tools. 06:27.900 --> 06:28.500 All right. 06:29.140 --> 06:30.860 Then we actually get to use it.