Thanks! Yellow is my favorite color!
On 10/10/07, Pablo Ziliani <[EMAIL PROTECTED]> wrote: > > Robert Dailey wrote: > > (...) > > What I was actually trying to accomplish was to iterate over 2 > > iterators using 1 for loop, however I found that the zip() function > > allows me to do this quite easily: > > > > list1 = [1,2,3] > > list2 = [4,5,6] > > > > for i1,i2 in zip( list1, list2 ): > > # do something here... > > > > In one of my earlier threads in this group someone had ended up using > > zip(). After reviewing that thread again I found that I could also use > > it to solve this problem as well. Sorry for lack of details. Thanks > > for everyone's help. > > Robert, > > You get one warning for top-posting and a yellow card for not being able > to state your needs correctly (so we can help you). Think pythonicly: > nobody actually *needs* to "dereference an iterator", but to get a > certain value from a some given sequences. > > Despite the subject, you ended up using a "iterator-less" solution. > There are reasons to use an iterator, though. You might want to take a > look at itertools.izip: > > class izip(__builtin__.object) > | izip(iter1 [,iter2 [...]]) --> izip object > | > | Return a izip object whose .next() method returns a tuple where > | the i-th element comes from the i-th iterable argument. The .next() > | method continues until the shortest iterable in the argument sequence > | is exhausted and then it raises StopIteration. Works like the zip() > | function but consumes less memory by returning an iterator instead of > | a list > > > Lame example follows: > > >>> from itertools import izip > >>> from string import lowercase > >>> for (i, l) in izip(range(len(lowercase)), lowercase): > ... print "do something with i = %s and l = %s" % (i, l) > ... > do something with i = 0 and l = a > do something with i = 1 and l = b > do something with i = 2 and l = c > do something with i = 3 and l = d > do something with i = 4 and l = e > do something with i = 5 and l = f > do something with i = 6 and l = g > do something with i = 7 and l = h > do something with i = 8 and l = i > do something with i = 9 and l = j > do something with i = 10 and l = k > do something with i = 11 and l = l > do something with i = 12 and l = m > do something with i = 13 and l = n > do something with i = 14 and l = o > do something with i = 15 and l = p > do something with i = 16 and l = q > do something with i = 17 and l = r > do something with i = 18 and l = s > do something with i = 19 and l = t > do something with i = 20 and l = u > do something with i = 21 and l = v > do something with i = 22 and l = w > do something with i = 23 and l = x > do something with i = 24 and l = y > do something with i = 25 and l = z > > > HTH, > Pablo >
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