[email protected] wrote:
> I was playing with Python tonight and created a simple program that
> outputs numbers counting up then counting down all on the same terminal
> line. The code is as follows:
>
>
>
> #------------------------------------------------------------
> a = 320000 #number to count up to
>
>
> for i in range (a):
> print i, '\r',
>
> for i in range ((a-1),0,-1):
> print i, '\r',
>
> #------------------------------------------------------------
>
>
>
>
> It works as desired. However, I was trying to figure out a way to make it
> more concise but
>
> cannot see a way since the 'range' parameters must be integers (no
> functions allowed?).
> Anyone see a way to simplify it?
r = range(320000)
for i in r + r[::-1]:
print i, "\r",
However, this has the disadvantage of building a list with 620000 items. To
avoid that you can write
from itertools import chain
r = xrange(320000)
for i in chain(r, reversed(r)):
print i, "\r",
but you probably don't see that as a simplification.
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