python中Jackson的替代方法是什么? [英] What is the alternative of Jackson in python?

问题描述

我正在使用 Jackson解析器将Java对象解析为 JSON .我使用以下代码为某些Java对象强加了JSON键.

I am using Jackson parser for parsing for Java object to JSON. I am forcefully adding JSON keys for some java objects, using the following code.

@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.WRAPPER_OBJECT)
@JsonSubTypes({ @JsonSubTypes.Type(value = A.class, name = "a"),
        @JsonSubTypes.Type(value = F.class, name = "f") })

我在Python中也有相同的set类.我想在python中做同样的事情.但不确定在Python中可用此Jackson注释的替代方法是什么.

I am having same set classes in Python also. I would like to do the same thing in python. But not sure about what are the alternatives for this Jackson annotation available in python.

我的要求是我必须向REST API发送POST请求.我需要将Java对象序列化为JSON.但是由于我的类结构有些不同，所以我没有在Java类中方便地提到所有JSON键.为了解决这个问题，我正在做的是在JSON中找到从Java传递来的"A"对象时，在JSON中添加了"a"键.它对"F"对象做同样的事情.因此，我已经按照上面提到的方式实现了解决方案.我想在Python中实现相同的目的.

My requirement is that I have to send a POST request to a REST API. I need to serialize the java object into JSON. But as my class structure is a little bit different I don't have all the JSON keys mentioned handy in java classes. To solve the issue what I am doing is that I am adding 'a' key in JSON when it finds 'A' object is passed from java. It is doing the same thing for 'F' object. So, I have achieved the solution the way I mentioned above. I want to achieve the same thing in Python.

是否存在一些可用的JSON解析器，或者我必须遵循一些不同的方法?

Is there some JSON parser available what does the same thing as mentioned above, or I have to follow some different approach for that?

推荐答案

attrs + cattrs 与任务非常接近.

attrs + cattrs is very close for the task.

在此处复制一个cattr示例，

copy one cattr example here,

>>> import attr, cattr
>>>
>>> @attr.s(slots=True, frozen=True)  # It works with normal classes too.
... class C:
...     a = attr.ib()
...     b = attr.ib()
...
>>> instance = C(1, 'a')
>>> cattr.unstructure(instance)
{'a': 1, 'b': 'a'}
>>> cattr.structure({'a': 1, 'b': 'a'}, C)
C(a=1, b='a')

但是它不如Jackson强大，我还没有找到在序列化json和反序列化python对象之间映射属性的解决方案.

but it's not as capable as Jackson, i've not yet been able to find a solution to map attribute between serialized json and deserialized python object.

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