On Wed, 18 Jun 2008, amit sethi wrote: > Hi , Could you please tell me , how i can traverse a two dimensional array , > i am sorry , it must be pretty simple but I am new to python am not able to > understand.
What many languages would call a two-dimensional array would be represented in Python as a list of lists; i.e., a list where each item in the list is itself another list. For example, if we have a list like this: >>> list_of_lists = [ ... [1, 2, 3, 4], ... ['A', 'B', 'C', 'D'], ... ["I", "II", "III", "IV"] ... ] >>> list_of_lists [[1, 2, 3, 4], ['A', 'B', 'C', 'D'], ['I', 'II', 'III', 'IV']] You can traverse it like this: >>> for inner_list in list_of_lists: ... print "inner_list is:", inner_list ... for item in inner_list: ... print "item:", item ... inner_list is: [1, 2, 3, 4] item: 1 item: 2 item: 3 item: 4 inner_list is: ['A', 'B', 'C', 'D'] item: A item: B item: C item: D inner_list is: ['I', 'II', 'III', 'IV'] item: I item: II item: III item: IV >>> There's no need for each inner list to be of the same length, by the way; I just made it so for this example. _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
