编辑了 _ Return 个来自 class 的对象

Question

我重新写了题，因为现在我明白了。

是否可以通过调用 class 来 return 一个对象？举个例子，我正在尝试连接到客户端服务器，只需调用 class，我就可以连接了。

如果我想在该服务器上启动一个新项目，我只需要初始化项目并自动调用连接。

class LabellingProject():
    def __init__(self, 
                 web_app=False,
                 port=8888,
                 data_dir="/xxxx/xxx/",
                 local_files_root="/xxxx/datasets",
                 disable_signup_without_link=True,
                 username= "xxxx@xxxx"):
        self.web_app = web_app
        self.port = port
        self.data_dir = data_dir
        self.local_files_root = local_files_root
        self.disable_signup_without_link = disable_signup_without_link
        self.username = username

    def connection(cls):
        """
        """
        config = Config(web_app=cls.web_app,
                        port = cls.port,
                        data_dir = cls.data_dir,
                        local_files_root=cls.local_files_root,
                        disable_signup_without_link=cls.disable_signup_without_link,
                        username=cls.username)
        server = LabelStudioServer()
        server.start(config)
        client = Client(url="http://localhost:"+str(config.port), 
                        api_key=config.token)

        return client
    
    def create_new(self,client):
        
        """
        """
        project = client.start_project()

        return project

我想这样调用函数。

labelling = LabellingProject() => it will return the connection

project = labelling.create_new() => it will return the project and the client it should take it from the __init__.

是不是更懂了？

Answer 1

createFromA 需要是 staticmethod，因为它不在 class Constructor

的实例上运行

class A:
    def __init__(self):
        pass
    def create_project(self,argA):
        
        newA = self.Constructor.createFromA(argA)
        
        return newA      
        
    class Constructor:
        def __init__(self):
            pass
        @staticmethod
        def createFromA(argA):
            A = 2*argA
            return A
        
        
cons = A()
cons.create_project(2)

编辑了 _ Return 个来自 class 的对象

Edited _ Return an object from a class

python

oop

class