[Python-ideas] Deprecate the round builtin

[Boris Borcic]

Mike Graham wrote:
> round(x, n) for n>0 is quite simply not sane code.

I've occasionally used round(x,n) with n>0 - as a quick way to normalize away 
numeric imprecisions and have values generated by a computation recognized as 
identical set elements or dictionary keys. I'd have used a function to round in 
binary instead of decimal had one been handy, but otoh I don't see it would make 
a real difference, would it?