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Beyond scraping

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Beyond scraping
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101
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169
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Anthon van der Neut - Beyond scraping Scraping static websites can be done with `urllib2` from the standard library, or with some slightly more sophisticated packages like `requests`. However as soon as JavaScript comes into play on the website you want to download information from, for things like logging in via openid or constructing the pages content, you almost always have to fall back to driving a real browser. For web sites with variable content this is can be time consuming and cumbersome process. This talk show how a to create a simple, evolving, client server architecture combining zeromq, selenium and beautifulsoup, which allows you to scrape data from sites like Sporcle, StackOverflow and KhanAcademy. Once the page analysis has been implemented regular "downloads" can easily be deployed without cluttering your desktop, your headless server and/or anonymously. The described client server setup allows you to restart your changed analysis program without having to redo all the previous steps of logging in and stepping through instructions to get back to the page where you got "stuck" earlier on. This often decreases the time between entering a possible fix in your HTML analysis code en testing it, down to less than a second from a few tens of seconds in case you have to restart a browser. Using such a setup you have time to focus on writing robust code instead of code that breaks with every little change the sites designers make.
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Element (mathematics)Web browserCommunications protocolWebsiteTable (information)Content (media)Client (computing)Web pagePasswordMultiplicationDifferent (Kate Ryan album)Field (computer science)Right angleSystem callComputer configurationElectronic visual displayPattern languageSoftwareComputer architectureResultantBuffer overflowCartesian coordinate systemCrash (computing)Type theoryStapeldateiLastteilungMultiplication signVirtualizationWordMotion captureInformationYouTubeSingle-precision floating-point formatProxy serverServer (computing)Price indexFront and back endsReal number2 (number)Extension (kinesiology)Line (geometry)Automatic differentiationPosition operatorInstance (computer science)Configuration spaceProbability density functionStructural loadSet (mathematics)Cursor (computers)Rule of inferenceScripting languageGodLinearizationBitTerm (mathematics)Density functional theoryComputer fileThermal radiationState of matterTwin primeProduct (business)Sampling (statistics)HypermediaStudent's t-testMatching (graph theory)Projective planeLevel (video gaming)Lecture/Conference
Student's t-testWindowMultiplication signPasswordSolid geometryWeb browserAreaElectronic visual displayBit rateState of matterData structureAsynchronous Transfer ModeVirtualizationMereologyLecture/Conference
Transcript: English(auto-generated)