关于python中的“相等”

a = 5
b = 5
print(a == b)  # 输出：True

list1 = [1, 2, 3]
list2 = [1, 2, 3]
print(list1 is list2)  # 输出：False

list3 = list1
print(list1 is list3)  # 输出：True

class Person:
    def __init__(self, name):
        self.name = name
    
    def __eq__(self, other):
        if isinstance(other, Person):
            return self.name == other.name
        return False

person1 = Person("Alice")
person2 = Person("Alice")
print(person1 == person2)  # 输出：True