[Chris Angelico] > I use decks of cards primarily for non-game > usage (for instance, teaching data structures and algorithms - cards > laid out on a table can represent a tree, heap, array, etc)
I do too. They're a great tool for visualizing and physically trying out different techniques. [Chris Angelico] > A deck containing four suits of thirteen > cards plus one joker would have 53 cards, which is a prime number; > printing 54 cards lets you lay them out as 9 by 6 on a sheet, so it's > easy to add a second joker. Some decks (I have an Alice in Wonderland > themed deck) have *four* jokers. > As such, the most logical way to do this would be as an attribute of > the card. In most cases I've seen wild cards used, it's a declaration about a certain card (e.g. "Eights are wild." or "The 2 of clubs is wild."). I've found that if you're trying to model a game like poker or Monopoly, it's tempting to add complexity to simple objects, but it can lead to problems later on. A card doesn't know if it's wild. That's a function of the game being played. An ace may be high or low. On Tue, Aug 21, 2018 at 2:06 PM, Chris Angelico <ros...@gmail.com> wrote: > On Wed, Aug 22, 2018 at 4:56 AM, Abe Dillon <abedil...@gmail.com> wrote: > > [Chris Angelico] > >> > >> In English, "card is not wild" can > >> be interpreted as a membership check, but in Python, it is only an > >> identity check; you're capitalizing on false readability by using this > >> notation. > > > > > > I promise that wasn't my intent. Since both my proposed form and the > lambda > > form use the same expression, > > it doesn't really tip the balance in favor of my argument. Also, most toy > > card problems I work with use a finite, > > immutable set of cards, so identity checking isn't *that* weird. > > Fair enough. To be fair, I use decks of cards primarily for non-game > usage (for instance, teaching data structures and algorithms - cards > laid out on a table can represent a tree, heap, array, etc), and my > decks of cards are artistic. A deck containing four suits of thirteen > cards plus one joker would have 53 cards, which is a prime number; > printing 54 cards lets you lay them out as 9 by 6 on a sheet, so it's > easy to add a second joker. Some decks (I have an Alice in Wonderland > themed deck) have *four* jokers. > > As such, the most logical way to do this would be as an attribute of > the card. Its jokerness is as much a feature as the clubness of > another card. You can pick up a physical card, look at it, and say > "This is a joker"; you don't have to see if it's in a list of specific > known jokers. > > hand = sorted(cards, by=value[card.suit] if not card.wild else > max_value with card) > > Honestly, though, it'd usually be more interesting to sort by rank > within suit. What you're doing here would group the cards by suit, > ignoring their ranks; more useful would be: > > hand = sorted(cards, key=lambda card: (card.is_wild, card.suit, card.rank)) > > Much cleaner. No conditionals needed. > > ChrisA > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ >
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