#100DaysOfCode in Python Transcripts
Chapter: Days 43-45: Consuming HTTP services
Lecture: Demo: Data version two: Better results
0:00 Let's make two quick improvements before we wrap up
0:03 this application. First, we're always searching for runner.
0:05 How exciting is it to always run this program
0:08 and just get the same results?
0:09 Let's actually make this a thing that the users can input.
0:13 So we'll begin by creating a variable.
0:14 We could just go and type a variable name, assign the value
0:17 and put it over here, and use PyCharm to refactor.
0:20 Say I want a variable called keyword.
0:22 That's pretty cool.
0:23 Make sure it still runs, it does.
0:25 But let's actually go and say input.
0:27 We'll ask the user for input, and we'll give them a prompt.
0:31 We'll say keyword of title search for movie,
0:34 or something like this.
0:36 So now when we run it down here I can search for away
0:39 and we get The Runaways.
0:41 I can search for runner and we should get Bladerunner,
0:46 and we can search for fight, Fight Club, whatever.
0:50 Whatever we want to search for, we can now do that.
0:52 This is already really awesome, but notice the API is,
0:56 I'm going to call it crummy.
0:57 So we're going to fix that with one more thing.
0:59 We're going to use this thing called collections.namedtuple
1:03 So down here I'll say I'm going to define this type that
1:05 represents a movie.
1:07 It's going to be a collection.namedtuple, and the way it works
1:10 is you say the name that it thinks its own name is,
1:13 and then you say all the fields that go in there.
1:16 Now this turns out to be quite a pain, so let's go back
1:19 over here and see what we get.
1:21 IMDB score, we have a rating, an we have all these things.
1:24 So this is the typical value here, it's going to look like this
1:29 So in order for this to work well, we have to have all these
1:32 values listed in series over here.
1:35 So, I'm just going to type this in, then I'll speed it up.
1:43 Phew, there I've typed them all in and I'll maybe do a few
1:45 line breaks here just so it fits on the screen.
1:48 I just typed in the top level elements here.
1:50 So what we can do, is we can actually instead of just
1:54 churning JSON results, we can actually go over them
1:57 and return these types, and we'll see why that's a benefit
2:00 in just a second.
2:01 So we'll say this, we'll say for our end results,
2:06 you know, the hits, maybe H, I don't know.
2:09 We're going to need a list, going to say movies, that's a list.
2:12 I'm going to put this in here, so we'll say movies.append
2:15 and we need to append one of these movies.
2:18 So we can create a new one and we have to type all of these
2:21 values in here.
2:22 We have to say IMDB code equals R.get IMDB code.
2:26 Title equals R.get title, and so on.
2:31 Or, there's a way to unpack a dictionary, which is what this
2:34 is, back into keyword arguments with the names being the
2:38 keys just like that.
2:40 And, the way you do that is you
2:42 say **, the dictionary name.
2:44 So it's as if you said IMDB code equals whatever value it
2:47 has for IMDB code.
2:49 Title equals whatever value it has for title.
2:52 It's just a super short, simple way to do that.
2:54 So now if we return movies, up here is not going to work the
2:58 same, but now we can just say R.title, and things like that.
3:05 HasScore, take that little bit away.
3:09 HasScore, let's say,r., what did we call it?
3:13 IMDB Score, that, now let's try that.
3:19 Now we are going to search for runner, stick with that.
3:22 Boom! Look how cool that is.
3:24 Now, we're still not where we quite really wanted to be.
3:26 If I hit dot, we get not, so as in not helpful!
3:31 One final trick of what we're going to do, let's go over here
3:34 and we can use what's called type hint in Python.
3:38 Python is a dynamic language, it has no syntactical typing,
3:42 but you can give the editors hints, and I can say this
3:44 is actually a string, so you say colon type name and the
3:48 return value is a list which is actually defined in a
3:52 typings module, so got to import that.
3:55 So we want typings.List.
3:56 Notice the, let's put at the top here.
3:59 And it's going to be a list of movies like this, okay.
4:03 So with a little bit of a hint, I can come over here and
4:07 now I type r., look at that, director, duration,
4:10 IMDB code, IMDB score.
4:13 Let's just add one more.
4:15 With code r.code, now that's the way we like to write.
4:22 All the help we can get.
4:24 Let's search one more.
4:26 Anything on computer, of course!
4:28 Hackers with code TT whatever HasScore 6.2.
4:32 Awesome, there you have it.
4:34 This is how we can consume the movie API.
4:37 When you've broken apart into our, our sort of user
4:41 interaction bit of code here, our API access code here.
4:46 We use requests to actually get the data and convert it
4:51 to JSON and we used a namedtuple to help package it up into
4:55 something that makes more sense to our program, as well
4:58 as adding a little type hints, so that the editor actually
5:01 leverages that help we gave it.