如何在appium中设置IP代理？

Question

在appium中设置代理时，我报告了以下错误

我试图用str或dict代理解决它。

class Moments(object):
    def __init__(self):
        self.desired_caps = {
            "platformName": "Android",
            "deviceName": "6EJ4C18801000055",
            "appPackage": "com.tencent.mm",
            "appActivity": ".ui.LauncherUI",
            "unicodeKeyboard": True,
            "resetKeyboard": True,
            "noReset": True 
        }
        self.driver = webdriver.Remote(driver_server, self.desired_caps, proxy={"http": 'http://122.7.226.222:4258'})

结果是：

  

AttributeError：'dict'对象没有属性'add_to_capabilities'
  当它是str时：AttributeError：'str'对象没有属性   'add_to_capabilities'

源代码如下：

if proxy is not None:
    warnings.warn("Please use FirefoxOptions to set proxy", DeprecationWarning, stacklevel=2)
    proxy.add_to_capabilities(capabilities)