On Tue 08 Jan 2013 07:19:59 PM EST, andydtay...@gmail.com wrote:
Hi!I might be missing the obvious, or I may have found something more complicated than the VBA I am used to. Could it be I need to use a maths library? For a given list of k items I'd like to turn it into an k*k matrix of item pairs. List_sample = ['a', 'b', 'c'] Output: aa ab ac ba bb bc ca cb cc I'd like to have 2 hooks into this process 1. I want the opportunity to use a value pair each time they are generated (because I need to send these to an api and get a number back to put into a temporary list or dictionary - still tbd). 2. I'd also like to know each time a row is completed so I can bank that temporary list to a database table. Else build one big list and do it at the end, I'm still figuring this out. #Code I've tried: stn_count = len(stn_list_short) for rowcount in range (0, stn_count): for colcount in range (0, stn_count): print stn_list_long[rowcount] stn_list_long[colcount] I've found itertools, tee, and product and felt I was getting warmer. I'm still looking, but any pointers would be appreciated! Thanks, Andy
You can use itertools.product("abc", repeat=2) together with itertools recipe grouper() from the same page:
http://docs.python.org/3.3/library/itertools.html?highlight=itertools#itertools HTH, -m -- Lark's Tongue Guide to Python: http://lightbird.net/larks/ -- http://mail.python.org/mailman/listinfo/python-list
