[Python-Dev] Polymorphic best practices [was: (Not) delaying the 3.2 release]

Terry Reedy tjreedy at udel.edu
Fri Sep 17 05:45:12 CEST 2010

Based on the discussion so far, I think you should go ahead and 
implement the API agreed on by the mail sig both because is *has* been 
agreed on (and thinking about the wsgi discussion, that seems to be a 
major achievement) and because it seems sensible to me also, as far as I 
understand it. The proof of the API will be in the testing. As long as 
you *think* it covers all intended use cases, I am not sure that 
abstract discussion can go much further.

I do have a thought about space and duplication. For normal messages, it 
is not an issue. For megabyte (or in the future, gigabyte?) attachments, 
it is. So if possible, there should only be one extracted blob for both 
bytes and string versions of parsed messages. Or even make the 
extraction from the raw stream lazy, when specifically requested.

Terry Jan Reedy

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