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There should be one obvious way to do it - CoR
In Chair of Responsibility design pattern, you mentioned "The client may trigger any handler in the chain" and the nature of the chain is dynamic. Isn't it against the PEP 20 – The Zen of Python "There should be one-- and preferably only one --obvious way to do it". So I think this is a con of CoR.
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Hi!
You might be right about that! Moreover, I think most patterns violate some of his principles, for example:
Still, for better or worse, the patterns are used universally and not just in the Python world.