[Python-ideas] Re: Why do we have two obvious ways to create a simple data structure? Let's deprecate one.

I'm with you on the backwards-compatibility front. Changing Python fast and for no particular reason incurs a big cost. Is the reason good enough to justify removing a chunk of the interface? Good question. To your dict argument: if there was a native Pythonic way to make a frozen list, what would a tuple's purpose be then, if not just another name for that? That also seems like an appropriate analogy.