[EMAIL PROTECTED] wrote: > Laurent Pointal: >> you may prefer range/items when processing of the result >> value explicitly need a list (ex. calculate its length) > > Creating a very long list just to know the len of an iterator is > barbaric, so sometimes I use this: > > def leniter(iterator): > if hasattr(iterator, "__len__"): > return len(iterator) > nelements = 0 > for _ in iterator: > nelements += 1 > return nelements > Of course this is a little like the Heisenberg uncertainty principle if the iterator has no __len__ attribute - once you know how long it is you no longer have access to the elements. Or did I miss something?
regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Blog of Note: http://holdenweb.blogspot.com See you at PyCon? http://us.pycon.org/TX2007 -- http://mail.python.org/mailman/listinfo/python-list
