I want to create a loop who has this sense:
for i in xrange(0,10):
for k in xrange(0,10):
z=k+i
print z
where the output should be
0
2
4
6
8
10
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14
16
18
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1Is that the real output you're looking for, or is this a simplified version of the problem?harto– harto2009-09-21 03:02:27 +00:00Commented Sep 21, 2009 at 3:02
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5 Answers
You can use zip to turn multiple lists (or iterables) into pairwise* tuples:
>>> for a,b in zip(xrange(10), xrange(10)):
... print a+b
...
0
2
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18
But zip will not scale as well as izip (that sth mentioned) on larger sets. zip's advantage is that it is a built-in and you don't have to import itertools -- and whether that is actually an advantage is subjective.
*Not just pairwise, but n-wise. The tuples' length will be the same as the number of iterables you pass in to zip.
Comments
The itertools module contains an izip function that combines iterators in the desired way:
from itertools import izip
for (i, k) in izip(xrange(0,10), xrange(0,10)):
print i+k
1 Comment
Daniel Pryden
And of course
zip() is a built-in function in Python. And Python 3.x's zip() works exactly like izip() from Python 2.xYou can do this in python - just have to make the tabs right and use the xrange argument for step.
for i in xrange(0, 20, 2);
print i
Comments
What about this?
i = range(0,10)
k = range(0,10)
for x in range(0,10):
z=k[x]+i[x]
print z
0 2 4 6 8 10 12 14 16 18
Comments
What you want is two arrays and one loop, iterate over each array once, adding the results.
