python <w.g.sned...@gmail.com> writes: > tag23gr is a list of lists each with two items. > g23tag is an empty dictionary when I run the for loop below. > When is is complete each key is a graphic name who's values are a list > of tags. > > for item in tag23gr: > ... value, key = tuple(item) > ... if(g23tag.get(key)): > ... g23tag[key].append(value) > ... else: > ... g23tag[key] = [value]
for item in tag23gr: g23tag.setdefault(item[0],[]).append(item[1]) -- Alain. -- http://mail.python.org/mailman/listinfo/python-list