基于项的公共切片文本对列表项进行分组

from collections import defaultdict

# 示例数据
user_list = [
    "Alice-25-Shanghai",
    "Bob-30-Shanghai",
    "Charlie-28-Beijing",
    "David-35-Beijing",
    "Eve-22-Guangzhou"
]

# 根据城市分组
grouped_users = defaultdict(list)
for user in user_list:
    name, age, city = user.split('-')
    grouped_users[city].append(user)

# 输出分组结果
for city, users in grouped_users.items():
    print(f"{city}: {users}")

grouped_users = defaultdict(list)
for user in user_list:
    name, age, city = user.split('-')
    grouped_users[city].append(user)

def parse_user(user):
    try:
        name, age, city = user.split('-')
        return name, int(age), city
    except ValueError:
        print(f"Invalid user data: {user}")
        return None, None, None

grouped_users = defaultdict(list)
for user in user_list:
    name, age, city = parse_user(user)
    if name and city:
        grouped_users[city].append(user)