It seems to me this is something of a pointless discussion -- I highly
doubt the current situation is going to change, and it works very well.
Even if not perfect, sum() is for numbers, sep.join() for strings. However,
I will add one comment:
I'm overall -1 on trying to change the current situation (except for
> adding a join() builtin or str.join class method).
Did you know there actually is a str.join "class method"? I've never
actually seen it used this way, but for people who just can't stand
sep.join(seq), you can always call str.join(sep, seq) -- works in Python 2
and 3:
>>> str.join('.', ['abc', 'def', 'ghi'])
'abc.def.ghi'
This works as a side effect of the fact that you can call methods as
cls.method(instance, args).
-Ben
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