On Mon, 10 Apr 2006, Hoffmann wrote: > Hello, > > I have a list: list1 = [ 'spam!', 2, ['Ted', 'Rock'] > ] > and I wrote the script below: > > i = 0 > while i < len(list1): > print list1[i] > i += 1 > > Ok. This script will generate as the output each > element of the original list, one per line: > > spam! > 2 > ['Ted', 'Rock'] > > I also would like to print the length of each element > of that list: > > spam! = 1 element > 2 = 1 element > ['Ted', 'Rock'] = 2 elements
Well, the length of "spam!" is 5. Lengths of strings express the number of characters. You could check to see if it's a grouping-type of element -- i.e., a list, tuple or set -- but I think your better approach is that, if this is something you need, make all of the elements lists, some of which are single-item lists; for example, instead of: list1 = [ 'spam!', 2, ['Ted', 'Rock'] ] use: list1 = [ ['spam!'], [2], ['Ted', 'Rock'] ] >>> list1 = [ ['spam!'], [2], ['Ted', 'Rock'] ] >>> for item in list1: ... print item, len(item) ... ['spam!'] 1 [2] 1 ['Ted', 'Rock'] 2 If your heart is set on the other approach, though, it can be done: >>> list1 = [ 'spam!', 2, ['Ted', 'Rock'] ] >>> for item in list1: ... if isinstance(item,(list, tuple, set)): ... print item, len(item) ... else: ... print item, 1 ... spam! 1 2 1 ['Ted', 'Rock'] 2 >>> _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
