Finding minimum, maximum and average values for nested lists?

Question

So I have these lists:

Player1 = ["Ryan", 24, 19]
Player2 = ["Jamie", 22, 24]
Player3 = ["Alicia", 17, 15]
Player4 = ["Dominique", 13, 11]
Player5 = ["Michael", 18, 23]

PlayerList = [Player1, Player2, Player3, Player4, Player5]

The format is [Player's name, first round score, second round score]

How to write a code to find the highest value, as well as the average for first and second scores respectively?

EDIT: I think I might need to print the 'name of the players with the highest score' instead of the 'highest score' but I don't know how to do that :\

Just saying, but it might be time to write a `Player` class. — Rik Poggi, Mar 25 '12 at 08:49
...or at least a tuple, it's conceptually more fitting than a list. — tokland, Mar 25 '12 at 09:42

David Robinson · Answer 1 · 2012-03-25T09:00:14.430

9

Highest value:

max(max(p[1:]) for p in PlayerList)

Lowest value:

min(min(p[1:]) for p in PlayerList)

Averages for each player::

[float(p[1] + p[2]) / 2 for p in PlayerList]

ETA: Per your comment, the name of the player with the highest score:

max(PlayerList, key=lambda p: max(p[1:]))[0]

edited Mar 25 '12 at 09:00

answered Mar 25 '12 at 08:19

David Robinson

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You could just call `max(max(p[1:]) for p in PlayerList)`. – kennytm Mar 25 '12 at 08:21
True, and as a generator that would be (slightly) faster – David Robinson Mar 25 '12 at 08:22
@KennyTM Is there any way that I can print the player's name who has the highest score as well? – DarsAE Mar 25 '12 at 08:41

score 1 · Answer 2 · answered Mar 25 '12 at 08:25

Max and min:

>>> max(PlayerList, key=lambda p: max(p[1:]))
['Ryan', 24, 19]
>>> min(PlayerList, key=lambda p: min(p[1:]))
['Dominique', 13, 11]

Average is a bit dirtier:

>>> [(p[0], sum(p[1:]) / 2.) for p in PlayerList]
[('Ryan', 21.5), ('Jamie', 23.0), ('Alicia', 16.0), ('Dominique', 12.0), ('Michael', 20.5)]

Marcelo Cantos · Answer 3 · 2012-03-25T09:23:58.300

To find the players with the highest and lowest score in any round:

(max_score, max_player) = max( (max(a, b), player) for (player, a, b) in players )
(min_score, min_player) = min( (min(a, b), player) for (player, a, b) in players )

If instead you want the players with the highest and lowest total scores, simply replace max(a, b) and min(a, b) with a + b.

Note that this picks a single best/worst player, even if there's a tie.

To find averages of the first and second scores:

avg_round1 = float(sum( a for (_, a, _) in players )) / len(players)
avg_round2 = float(sum( b for (_, _, b) in players )) / len(players)

Finding minimum, maximum and average values for nested lists?

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