stylistic question -- optional return value
ark at research.att.com
Wed Aug 28 20:47:41 CEST 2002
>> From: Andrew Koenig [mailto:ark at research.att.com]
>> Suppose I have a function that sometimes returns one value
>> and sometimes returns two. What's the cleanest way to define
>> such an interface?
Bjorn> The only time I've had type errors in my Python programs is when I've
Bjorn> tried to do this with a function. If I *have* to do it, I would probably
Bjorn> chose something along the lines of:
Bjorn> def fn(args):
Bjorn> class Tmp: pass
Bjorn> tmp = Tmp()
Bjorn> tmp.x = __
Bjorn> tmp.y = __
Bjorn> return tmp
Bjorn> your next question should be "why isn't fn a method of Tmp instead" to
Bjorn> which I would reply "indeed" <wink>
Actually, my next question would be why you didn't use a 2-tuple instead of
defining a class with the same properties.
And my answer to your question is that the function I'm defining is actually
a family of methods in a fairly substantial class hierarchy.
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