On 10/9/2013 22:14, Steven D'Aprano wrote: > On Tue, 10 Sep 2013 14:08:45 -0700, stas poritskiy wrote: > >> Greetings to all! >> >> i ran into a little logic problem and trying to figure it out. >> >> my case is as follows: >> >> i have a list of items each item represents a Group >> i need to create a set of nested groups, >> so, for example: >> >> myGroups = ["head", "neck", "arms", "legs"] > > > What is the rule for grouping these items? Below, you suggest: > > head encloses neck > neck encloses arms > arms encloses legs > > which seems rather strange. But if it is *always* the case that each item > encloses the next item: > > def print_nested_list(alist): > spaces = ' '*4 > for level, item in enumerate(alist): > if level != 0: > indent = spaces*(level-1) + ' ' > print (indent + '|_>'), # note comma > print item > > > which gives us this: > > py> print_nested_list(['head', 'neck', 'arms', 'legs']) > head > |_> neck > |_> arms > |_> legs > > > as requested. > >
Very nice. But what I want to know is how did you know that Stan (the OP) wanted his printed output to be formatted that way? He said: >>>>> i need to create a set of nested groups, and >>>>> store each of the first elements of a par, so I can reference to them as >>>>> to a parent of another group. -- DaveA -- https://mail.python.org/mailman/listinfo/python-list
