静态方法中的python类变量

Question

[更新]:完整代码

我总是对 pyhton 的静态方法感到困惑但根据this (最后一个答案)，它应该工作!

获取错误:

AttributeError: class MyConnection has no attribute 'myuser'

class MyConnection:
    def __init__(self, hostname, port, user, password):
        myhostname = hostname
        myport = port
        myuser = user
        mypassword = password
        isisessid = None

    @staticmethod
    def connect():
        my_session = MyConnection()

        headers = {'content-type': 'application/json'}
        headers['Authorization'] = 'Basic ' + string.strip(
            base64.encodestring(MyConnection.myuser + ':' + MyConnection.mypassword))

        body = json.dumps({'username': MyConnection.myuser, 'password': MyConnection.mypassword,
            'services': ['platform', 'namespace']})

        uri = '/session/1/session'

        connection = httplib.HTTPSConnection(MyConnection.myhostname, MyConnection.myport)
        connection.connect()

        try:
            connection.request('POST', uri, body, headers)
            response = connection.getresponse()
            my_session.isisessid = MyConnection.extract_session_id(
                response.getheaders())
        except Exception, e:
            print e
            connection.close()
        except httplib.BadStatusLine, e:
            print e
            connection.close()

        return my_session

Answer 1

如果属性是静态的，不要在初始化方法中初始化它们，在类级别外部声明它们，而不是在方法级别。

但是为什么要在初始化器中初始化类属性呢？您创建的每个实例都会覆盖它们的值!

我相信您混淆了instance 属性和class 属性的用途。为什么不尝试只使用实例属性？综合考虑，拥有静态数据不是一个好主意。例如:

class MyConnection:
    def __init__(self, hostname, port, user, password):
        self.myhostname = hostname
        self.myport = port
        self.myuser = user
        self.mypassword = password
    @staticmethod
    def connect():
        my_session = MyConnection()
        print my_session.myuser # just an example