如何为一个团队加分?
这是我尝试过的:
def check_league(league_points):
league_results = []
for teams in league_points:
team, points = teams.strip().rsplit(' ', 1)
print(team, points)
这是我的清单:
['Lions 1', 'Snakes 1', 'Tarantulas 3', 'FC Awesome 0', 'Lions 1', 'FC Awesome 1', 'Tarantulas 3', 'Snakes 0', 'Lions 3', 'Grouches 0']
输出:
('Lions', '1')
('Snakes', '1')
('Tarantulas', '3')
('FC Awesome', '0')
('Lions', '1')
('FC Awesome', '1')
('Tarantulas', '3')
('Snakes', '0')
('Lions', '3')
('Grouches', '0')
我希望输出为:
'Tarantulas', '6'
'Lions', '5'
'FC Awesome', '1'
'Snakes', '1'
'Grouches', '0'
答案 0 :(得分:2)
将itertools.groupby
与sorted
一起使用:
import itertools
func = lambda x:x[0]
sorted_l = sorted([i.rsplit(' ', 1) for i in l], key=func)
{k: sum(map(int, list(zip(*g))[1])) for k, g in itertools.groupby(sorted_l, key=func)}
输出:
{'FC Awesome': 1, 'Grouches': 0, 'Lions': 5, 'Snakes': 1, 'Tarantulas': 6}
答案 1 :(得分:1)
您可以使用defaultdict
并遍历列表中str.rsplit
的项目:
>>> from collections import defaultdict
>>> d = defaultdict(int)
>>> l = ['Lions 1', 'Snakes 1', 'Tarantulas 3', 'FC Awesome 0', 'Lions 1', 'FC Awesome 1', 'Tarantulas 3', 'Snakes 0', 'Lions 3', 'Grouches 0']
>>> for n, _, v in map(lambda s: s.rpartition(' '), l):
... d[n] += int(v)
...
>>> d
defaultdict(<class 'int'>, {'Lions': 5, 'Snakes': 1, 'Tarantulas': 6, 'FC Awesome': 1, 'Grouches': 0})
此算法在O(n)
中运行,无需排序。
答案 2 :(得分:1)
我将字符串分成小组和分数,然后在我们创建字典的过程中。
li = ['Lions 1', 'Snakes 1', 'Tarantulas 3', 'FC Awesome 0', 'Lions 1', 'FC Awesome 1', 'Tarantulas 3', 'Snakes 0', 'Lions 3', 'Grouches 0']
dct = {}
for l in li:
#Split only on last space
name, count = l.rsplit(' ',1)
if name in dct:
dct[name] += int(count)
else:
dct[name] = int(count)
print(dct)
#{'Lions': 5, 'Snakes': 1, 'Tarantulas': 6, 'FC Awesome': 1, 'Grouches': 0}