Python-通过属性将类的实例分组在一起

class Person:
    def __init__(self, name, age, group):
        self.name = name
        self.age = age
        self.group = group

# 创建实例
person1 = Person("Alice", 25, "Group1")
person2 = Person("Bob", 30, "Group2")
person3 = Person("Charlie", 35, "Group1")

# 分组
groups = {}
for person in [person1, person2, person3]:
    group = person.group
    if group not in groups:
        groups[group] = []
    groups[group].append(person)

# 输出每个组的成员
for group, members in groups.items():
    print(f"Group {group}:")
    for member in members:
        print(f"- {member.name} ({member.age} years old)")

Group Group1:
- Alice (25 years old)
- Charlie (35 years old)
Group Group2:
- Bob (30 years old)