Re: iterating over two arrays in parallel?
[EMAIL PROTECTED] wrote: I want to interate over two arrays in parallel, something like this: a=[1,2,3] b=[4,5,6] for i,j in a,b: print i,j where i,j would be 1,4,2,5, 3,6 etc. Is this possible? How to fish for yourself: search 'Python loop two arrays parallel' and second hit with Google is http://docs.python.org/tut/node7.html which has this entry To loop over two or more sequences at the same time, the entries can be paired with the zip() function. questions = ['name', 'quest', 'favorite color'] answers = ['lancelot', 'the holy grail', 'blue'] for q, a in zip(questions, answers): ... print 'What is your %s? It is %s.' % (q, a) ... What is your name? It is lancelot. What is your quest? It is the holy grail. What is your favorite color? It is blue. Or go to the Tutorial directly, expand the chapter headings, and notice that 5. Data Structures has section 5.6 Looping Techniques. Indeed, I recommend that you read thru at least the first 9 chapters. tjr -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating over two arrays in parallel?
I want to interate over two arrays in parallel, something like this: a=[1,2,3] b=[4,5,6] for i,j in a,b: print i,j where i,j would be 1,4,2,5, 3,6 etc. Is this possible? Many TIA! Mark list_1 = range( 1 , 4 ) list_2 = range( 4 , 7 ) list12 = zip( list_1 , list_2 ) for this in list12 : ... print ' ' , this ... (1, 4) (2, 5) (3, 6) for i , j in list12 : ... print ' ' , i , j ... 1 4 2 5 3 6 -- Stanley C. Kitching Human Being Phoenix, Arizona -- http://mail.python.org/mailman/listinfo/python-list
iterating over two arrays in parallel?
I want to interate over two arrays in parallel, something like this: a=[1,2,3] b=[4,5,6] for i,j in a,b: print i,j where i,j would be 1,4,2,5, 3,6 etc. Is this possible? Many TIA! Mark -- Mark Harrison Pixar Animation Studios -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating over two arrays in parallel?
mark == mh [EMAIL PROTECTED] writes: mark I want to interate over two arrays in parallel, something like this: mark a=[1,2,3] mark b=[4,5,6] mark for i,j in a,b: mark print i,j mark where i,j would be 1,4,2,5, 3,6 etc. a = [1,2,3] b = [4,5,6] for (i,j) in zip(a,b): print i, j To avoid recreating the entire list you can substitute itertools.izip for zip. Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating over two arrays in parallel?
Quoting [EMAIL PROTECTED]: I want to interate over two arrays in parallel, something like this: a=[1,2,3] b=[4,5,6] for i,j in a,b: print i,j where i,j would be 1,4,2,5, 3,6 etc. Is this possible? Yeap. === for i,j in zip(a,b): print i,j === Or better yet (memory wise at least) === from itertools import izip for i,j in izip(a,b): print i,j === (zip creates a list with the pairs (i,j), izip returns an iterator over the pairs i,j) -- Mark Harrison Pixar Animation Studios Are you really from Pixar? Cool Cheers, -- Luis Zarrabeitia Facultad de Matemática y Computación, UH http://profesores.matcom.uh.cu/~kyrie -- http://mail.python.org/mailman/listinfo/python-list
