On 08/06/2012 08:29 PM, Grant Edwards wrote:
On 2012-08-06, Grant Edwards <invalid@invalid.invalid> wrote:
On 2012-08-06, Tom P <werot...@freent.dd> wrote:
On 08/06/2012 06:18 PM, Nobody wrote:
On Mon, 06 Aug 2012 17:52:31 +0200, Tom P wrote:
consider a nested loop algorithm -
for i in range(100):
for j in range(100):
do_something(i,j)
Now, suppose I don't want to use i = 0 and j = 0 as initial values, but
some other values i = N and j = M, and I want to iterate through all
10,000 values in sequence - is there a neat python-like way to this?
for i in range(N,N+100):
for j in range(M,M+100):
do_something(i,j)
Or did you mean something else?
no, I meant something else ..
j runs through range(M, 100) and then range(0,M), and i runs through
range(N,100) and then range(0,N)
In 2.x:
for i in range(M,100)+range(0,M):
for j in range(N,100)+range(0,N):
do_something(i,j)
Dunno if that still works in 3.x. I doubt it, since I think in 3.x
range returns an iterator, not?
Indeed it doesn't work in 3.x, but this does:
from itertools import chain
for i in chain(range(M,100),range(0,M)):
for j in chain(range(N,100),range(0,N)):
do_something(i,j)
ah, that looks good - I guess it works in 2.x as well?
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