Aquí hay un ejemplo bastante elaborado, destinado a fines educativos en lugar de desempeño. Introduce algunos conceptos interesantes de Python, como las listas de comprensiones y generadores, así como un buen ejemplo de recursión en el que los casos marginales deben verificarse adecuadamente. Las extensiones, por ejemplo, solo los equipos con el mismo número de jugadores son válidos, son fáciles de implementar en las funciones individuales apropiadas.
def listFairestWeakTeams(ratings):
current_best_weak_team_rating = -1
fairest_weak_teams = []
for weak_team in recursiveWeakTeamGenerator(ratings):
weak_team_rating = teamRating(weak_team, ratings)
if weak_team_rating > current_best_weak_team_rating:
fairest_weak_teams = []
current_best_weak_team_rating = weak_team_rating
if weak_team_rating == current_best_weak_team_rating:
fairest_weak_teams.append(weak_team)
return fairest_weak_teams
def recursiveWeakTeamGenerator(
ratings,
weak_team=[],
current_applicant_index=0
):
if not isValidWeakTeam(weak_team, ratings):
return
if current_applicant_index == len(ratings):
yield weak_team
return
for new_team in recursiveWeakTeamGenerator(
ratings,
weak_team + [current_applicant_index],
current_applicant_index + 1
):
yield new_team
for new_team in recursiveWeakTeamGenerator(
ratings,
weak_team,
current_applicant_index + 1
):
yield new_team
def isValidWeakTeam(weak_team, ratings):
total_rating = sum(ratings)
weak_team_rating = teamRating(weak_team, ratings)
optimal_weak_team_rating = total_rating // 2
if weak_team_rating > optimal_weak_team_rating:
return False
elif weak_team_rating * 2 == total_rating:
# In case of equal strengths, player 0 is assumed
# to be in the "weak" team
return 0 in weak_team
else:
return True
def teamRating(team_members, ratings):
return sum(memberRatings(team_members, ratings))
def memberRatings(team_members, ratings):
return [ratings[i] for i in team_members]
def getOpposingTeam(team, ratings):
return [i for i in range(len(ratings)) if i not in team]
ratings = [5, 6, 2, 10, 2, 3, 4]
print("Player ratings: ", ratings)
print("*" * 40)
for option, weak_team in enumerate(listFairestWeakTeams(ratings)):
strong_team = getOpposingTeam(weak_team, ratings)
print("Possible partition", option + 1)
print("Weak team members: ", weak_team)
print("Weak team ratings: ", memberRatings(weak_team, ratings))
print("Strong team members:", strong_team)
print("Strong team ratings:", memberRatings(strong_team, ratings))
print("*" * 40)
Salida:
Player ratings: [5, 6, 2, 10, 2, 3, 4]
****************************************
Possible partition 1
Weak team members: [0, 1, 2, 5]
Weak team ratings: [5, 6, 2, 3]
Strong team members: [3, 4, 6]
Strong team ratings: [10, 2, 4]
****************************************
Possible partition 2
Weak team members: [0, 1, 4, 5]
Weak team ratings: [5, 6, 2, 3]
Strong team members: [2, 3, 6]
Strong team ratings: [2, 10, 4]
****************************************
Possible partition 3
Weak team members: [0, 2, 4, 5, 6]
Weak team ratings: [5, 2, 2, 3, 4]
Strong team members: [1, 3]
Strong team ratings: [6, 10]
****************************************