[EMAIL PROTECTED] (Alex Martelli) writes: > > for i in (1 to 10 by 3): > > print i > > > > should print 1 4 7. > > But that would be an "attractive nuisance" to many other native speakers > like you, who would instinctively think of a closed interval. Maybe > 'upto' rather than 'to', as somebody else suggested, would ease that.
I don't think "upto" is any better. Any distinction that might exist between "to" and "upto" doesn't jump out at me. I notice that Haskell uses closed intervals: [1..5] means [1,2,3,4,5]. Is that an error by Haskell's designers? One possibility is that those intervals don't actually get used in ways likely to cause one-off errors. I haven't used Haskell enough to have any sense of this. Here's something ugly but explicit, somewhat Haskell-inspired: (1 .. ) # infinite generator, like Haskell (1 .. < 10) # semi-closed interval: 1,2,3...,9 (1 .. <= 10) # closed interval: 1,2,3...,10 (1,4 .. < 10) # semi-closed: 1,4,7 (1,4, .. <= 10) # closed: 1,4,7,10 This would be horrible for Python though. -- http://mail.python.org/mailman/listinfo/python-list
