Consuming HTTP Services in Python Transcripts
Chapter: Initial HTTP GET requests with the requests package
Lecture: A simple GET with requests
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Now that we're up and running with Requests,
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let's make a simple get to a web page.
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So first of all, we are going to need the Python script to run aren't we,
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so let's go create a new Python file and we'll just call this simple get,
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and PyCharm is asking should this go into the github repository, yes, it should.
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Okay, so what we are going to do is we are going to start by importing Requests
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and that is coming out of our virtual environment that we wired into PyCharm here,
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and let's just make sure that works,
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so we'll just do a little print here and we can make,
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over here there is no our little run button, it's grey,
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that's because there is no what is called a run configuration,
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so let's create that by right clicking here, and saying run,
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and notice it's using our virtual environment Python here, and it just says hello.
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And so import, that worked well, our environment is working,
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everything is looking great so far, so the first thing we are going to need is a url.
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And let's just go to talkpython.fm and do a download there,
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so what we are going to do is we are going to use requests
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we are going to do a get, we are going to issue that get to a url,
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we are going to capture that into a variable called response, or resp,
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now we can come over here and just print out
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and see what happens, see if this works,
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so there is a little pause, it actually did the download and we got a 200,
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that is awesome, so it looks like that worked.
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HTTP 200, that is about as good as it gets.
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So, let's actually add a little check to make sure this works,
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so suppose I had something wrong here, we should have
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a 404 or something to that effect, or even worse, something worse.
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Okay, so it looks like the response came out great, so let's do a little test,
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we'll say if resp.status_code ! = to 200, then something went bad,
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we'll print error requesting url,
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maybe we'll put the little response code here, something like that.
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And then, I like to return or break, I can do an else here,
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but let's go ahead and make this a little nicer, I am going to define a main method,
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which is this, and that is going to be the code, and we'll just run this main method,
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if and only if it's time, so here we can say return and we'll be out of here,
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so we'll cancel a lot of this execution if there is an error but if there is not,
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we are going to print out, let's just print out resp.text.
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Now, that is going to show the entire page, you'll see it's screen by,
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maybe we just want the first 500 characters, just to see the title,
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so of course we can use a slice on the string, which is nice, here we go,
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so let's see the title here, talk python to me podcast- alright, it looks like this works,
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so super easy, request.get, give it the url,
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check the status code and work with the text.
