The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.
La Liga has El Clásico, France has Le Classique, and Argentina goes full gun with its Superclásico. English football has no true equivalent, with Liverpool and Manchester United fans unable to agree on a name for their grand-slam meetings. Up in the land of fitba, there’s this weekend’s 450th Old Firm/Glasgow derby (delete as applicable according to your stringency on Scottish company law). And Germany has Der Klassiker, between Bayern Munich and Borussia Dortmund. The Bundesliga marketing suits have been out in force this week for the one game, played on Saturday evening, that brings extra eyeballs. Though questions are often raised over whether this is a true, classic rivalry; Dortmund have not won a league title since Jürgen Klopp was making his rounds in 2012.
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"""抓取并处理单个详情页"""
print(f"Completed! Processed {len(self.seen_urls)} pages")
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