And I don't mean to pick on request() (it's really useful), just a good example of strings being preferred over structured data.
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I'm all for structured data but it gets mashed together into a url, sent, and then parsed again anyway.
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The value is that a URL library does the encoding for you rather than you doing it by hand.
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I only see a problem with that if you construct the argument for request() at runtime. That would be when to use a library.