Scraping is powerful, and yet not always easy to execute. Now and then, websites change the layout, forcing scrapers to break. Some sites block bots, while others require login access.
Data scientists often resort to proxies, headless browsers, and clever scraping tools in these situations. Most will also implement delay timers to mask the scrapers.
At the same time, maintaining the scraper can involve updates at short notice. A clean set of data is another challenge, which is why parsing and cleaning come into play.
