Python：从列表中打印n个随机项，但输出必须满足多个规则[duplicate]

Question

在python中，我想从一个较大的字符串列表中打印一个较小的随机选择字符串列表，返回n个项目。但是，生成的较小列表必须对其应用条件，以便某些项不能同时存在于新的较小列表中。

以我正在研究的这个例子为例：使用python，我想随机生成两个独特的运动队（team1，team2，每个队有5名球员），从可用球员的组合列表中相互比赛（players\u available，总共10名球员）。

players_available是手动预定义的，存在于玩家名字列表中，如'Tom'，'Lucy'

我将如何在python中执行此操作？我已经从主列表中打印了两个唯一的列表，但我不确定应用规则的最佳方法

# Sports match team selection script (2 teams of 5 players each team)
import random

# available players (always an even number of items in this list. Could be 10, 12 or 14)
players_available = ['Tom', 'Lucy', 'James', 'Josh', 'Steve', 'Mike', 'Darren', 'Joe', 'Delia', 'Gordon']

# number of players required per team (will always be half the number of players available)
n = 5

# current top 2 players (manually chosen)
best1 = 'Steve'
best2 = 'Mike'

# selection rules (only written here as descriptive strings for clarity. NOT currently implemented in team selection code below! How would I do this properly?)
rule1 = 'Tom and James cant be on the same team'
rule2 = 'Josh must be on the same team as Gordon'
rule3 = 'best1 and best2 cant be on the same team'
# etc etc... until rule 10 (there'll be no more than 10 rules)

# generate team 1
team1 = random.sample(players_available, n)
print(team1)

# remaining players
players_remaining = players_available
for player in team1:
    if player in players_remaining:
        players_remaining.remove(player)

# create team 2
team2 = players_remaining
print(team2)

我不是Python专家，所以我试图找出一个解决方案，使用基本的python原则（即如果/elif语句的负载？）和核心python库（尽可能少最好）。

Answer 1

你可以把列表洗牌，拿上半场，对照你的规则检查一下。如果所有规则返回True，则可以停止洗牌。

这种方法是非常基本的，不太可能在大量玩家和规则的情况下很好地扩展，因为你不会在每次洗牌后从池中淘汰玩家。然而，由于小尺寸和有限的限制，这不是一个问题。

import random

def rules(team):
    separate = ['Tom','James']
    together = ['Josh','Gordon']
    best = ['Steve','Mike']
    
    s = sum([x in team for x in separate]) == 1
    t = all([x in team for x in together]) or not all([x in team for x in together])
    b = sum([x in team for x in best]) == 1
    return s & t & b


players_available = ['Tom', 'Lucy', 'James', 'Josh', 'Steve', 'Mike', 'Darren', 'Joe', 'Delia', 'Gordon']

while True:
    random.shuffle(players_available)
    t1 = players_available[:5]
    t2 = players_available[5:]
    if rules(t1):
        break
        
        
print(t1,t2, sep='\n')

输出

['Lucy', 'Mike', 'James', 'Joe', 'Gordon']
['Delia', 'Steve', 'Tom', 'Josh', 'Darren']