marcus lütolf píše v St 13. 04. 2016 v 21:41 +0200: > Hello experts > > I'am working exercise 5. of 'Practical Programming 2nd edition, .....using > Python 3' (operations on lists). > The following code get's me wrong results: > > >>> metals = [['beryllium', 4],['magnesium', 12], ['calcium', 20], > >>> ['strontium', 38], ['barium', 56], ['radium', 88]] > >>> max(metals) > ['strontium', 38] > >>> min(metals) > ['barium', 56] > > It should return > ['radium', 88] and > ['beryllium', 4] respectively
> > What's wrong ? You must tell to function max() or min() what do you want... list metals has nested lists - use lambda function like key function for max(), min(), that the key value for sorting is the second value in nested lists: max(iterable, key=function) max(metals, key=lambda item_of_nested_list:item_of_nested_list[1]) min(metals, key=lambda item_of_nested_list:item_of_nested_list[1]) This is only one way of solution... -- S pozdravem -- ------------------------------------------------- Ing. Ondrej Rusek GYmnazium BOzeny Nemcove, Hradec Kralove, Czech ru...@gybon.cz, http://www.gybon.cz/~rusek ------------------------------------------------- -- Tato zprava byla prohledana na vyskyt viru a nebezpecneho obsahu antivirovym systemem MailScanner a zda se byt cista. _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
