python中getattr(),setattr(),hasattr()的用法及作用

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

apollo = Person('Apollo', 28)

getattr_res = getattr(apollo, 'name')
# 获取属性值
# Apollo
print(getattr_res)

hasattr_res = hasattr(apollo, 'name')
# 返回值为布尔类型,有属性返回True,否则返回false
# True
print(hasattr_res)

setattr_res = setattr(apollo, 'gender', 'male')
# 查看对象所有属性
# {'name': 'Apollo', 'age': 28, 'gender': 'male'}
print(apollo.__dict__)