Phillip J. Eby wrote: > Actually, one could consider "case" expressions to be computed at function > definition time, the way function defaults are. That would solve the > problem of symbolic constants, or indeed any sort of expressions. That's an excellent idea! > It's just a question of which one is easier to explain. I think the function-definition-time one is easiest to both explain and also to reason about when writing code, since definition time is well-defined, whereas "the first time it's executed" is somewhat fuzzy. It's also a lot clearer how it interacts with closures, which is another good point. I recommend adding this option to the relevant PEP (whichever it is). -- Greg
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