[Python-Dev] What if replacing items in a dictionary returns the new dictionary? (original) (raw)

Roy Hyunjin Han starsareblueandfaraway at gmail.com
Fri Apr 29 17:05:35 CEST 2011


You can implement this in your own subclass of dict, no?

Yes, I just thought it would be convenient to have in the language itself, but the responses to my post seem to indicate that [not returning the updated object] is an intended language feature for mutable types like dict or list.

class ReplaceableDict(dict): def replace(self, **kw): 'Works for replacing string-based keys' return dict(self.items() + kw.items())



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