Javascript-Style Objects in Python

Re:Javascript-Style Objects in Python by wbkang on Monday March 16, 2015 @01:24PM (#9212847)

I thought this was something implemented using metaclasses to not have to use dictionary-style field access... (e.g., obj.field instead of obj['field'] )

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Re:Javascript-Style Objects in Python by voyou on Monday March 16, 2015 @01:47PM (#9212994)

I don't think you need to use metaclasses, you can just define the relevant magic methods, something like:

    class JSLikeObject(dict):
        __getattr__ = dict.__getitem__
        __setattr__ = dict.__setitem__

ETA: That gets you JavaScript-style equivalence between attribute and index lookup, but it doesn't get you JavaScript-like binding of "this". I think you could probably do that with descriptors (and maybe it would require writing a metaclass).

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Re:Javascript-Style Objects in Python by icebraining on Monday March 16, 2015 @01:49PM (#9213013)

Yeap: http://code.activestate.com/recipes/473786-dictionary-with-a...

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