On 11/7/2012 12:08 PM, Serhiy Storchaka wrote:
On 07.11.12 17:12, Nick Coghlan wrote:
Since you've indicated the implementation is in the wrong here and you also want to preserve opcode semantics, I think Skip's patch is correct, but also needs to be applied to dict comprehensions (now we have them). The extra bytecode is only ROT_TWO, which is one of the cheapest we have kicking around :)
Not only to dict comprehensions, but also to item assignments. It will be weird if a dict comprehension and a plain loop will be inconsistent.
Just to be clear: the reference guide says that the behavior *SHOULD BE* (but is not yet) this: Python 3.3.0 >>> {print("a"):print("b")} a b {None: None} >>> d = {} >>> d[print("a")] = print("b") b a >>> Is this or is this not "weird" to you? --Ned.
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