reversed(enumerate(x))
Ian Kelly
ian.g.kelly at gmail.com
Wed Jul 20 13:42:02 EDT 2016
I had occasion to write something like this:
for i, n in reversed(enumerate(x)): pass
Of course this fails with "TypeError: argument to reversed() must be a
sequence". I ended up using this instead:
for i, n in zip(reversed(range(len(x))), reversed(x)): pass
This works but is extraordinarily ugly and not terribly clear. I think
it's less confusing however than:
for i, n in zip(range(len(x)-1, -1, -1), reversed(n)): pass
How would you write this?
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