在运行时为嵌套属性构建类映射,可以通过使用反射和递归来实现。以下是一个示例的步骤:
下面是一个示例代码:
import inspect
def build_class_mapping(obj, mapping):
obj_type = type(obj)
new_obj = obj_type()
for attr_name, attr_value in obj.__dict__.items():
if attr_name in mapping:
mapped_attr_name = mapping[attr_name]
setattr(new_obj, mapped_attr_name, attr_value)
elif inspect.isclass(attr_value):
mapped_attr_value = build_class_mapping(attr_value, mapping)
setattr(new_obj, attr_name, mapped_attr_value)
return new_obj
使用示例:
class Person:
def __init__(self, name, age, address):
self.name = name
self.age = age
self.address = address
class Address:
def __init__(self, city, country):
self.city = city
self.country = country
person = Person("John", 30, Address("New York", "USA"))
mapping = {
"name": "fullName",
"address": "location"
}
mapped_person = build_class_mapping(person, mapping)
print(mapped_person.fullName) # Output: John
print(mapped_person.location.city) # Output: New York
print(mapped_person.location.country) # Output: USA
在这个示例中,我们定义了一个Person
类和一个Address
类,Person
类包含一个嵌套属性address
,类型为Address
类。我们使用build_class_mapping
函数为Person
对象构建了一个新的类映射,并指定了属性名的映射关系。最后,我们可以通过新的类映射访问属性值。
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