Message174593
(Benjamin, did you mean 'silently accepting duplicates'?)
Without more use cases and support (from discussion on python-ideas), I think this should be rejected. Being able to re-write keys is fundamental to Python dicts and why they can be used for Python's mutable namespaces. A write-once or write-key-once dict would be something else.
As for literals, a code generator could depend on being able to write duplicate keys without having to go back and erase previous output. A lint-type code checker program could check for duplicate keys. OP: have you checked to see if PyLint or PyChecker or ... already do this? I think this is the appropriate place for such a thing. Lukas' code could be modified to do this also.
Keeping keys alphabetical (possibly within sections) should also solve this specialized problem. |
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2012-11-02 22:22:49 | terry.reedy | set | recipients:
+ terry.reedy, jcea, benjamin.peterson, r.david.murray, ebfe, Ramchandra Apte, Albert.Ferras |
2012-11-02 22:22:48 | terry.reedy | set | messageid: <1351894968.48.0.193742627481.issue16385@psf.upfronthosting.co.za> |
2012-11-02 22:22:48 | terry.reedy | link | issue16385 messages |
2012-11-02 22:22:46 | terry.reedy | create | |
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