Error

Traceback (most recent call last):

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/unittest/case.py", line 322, in run

    self.setUp()

  File "/Users/zhanglingling/Downloads/code/python/s53-4720257/workspace/NativeApp/add.py", line 23, in setUp

    self.driver = webdriver.Remote('http://localhost:4723/wd/hub', desired_caps)

  File "/Library/Python/2.7/site-packages/appium/webdriver/webdriver.py", line 36, in __init__

    super(WebDriver, self).__init__(command_executor, desired_capabilities, browser_profile, proxy, keep_alive)

  File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 98, in __init__

    self.start_session(desired_capabilities, browser_profile)

  File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 185, in start_session

    response = self.execute(Command.NEW_SESSION, parameters)

  File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 249, in execute

    self.error_handler.check_response(response)

  File "/Library/Python/2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 164, in check_response

    raise exception_class(value)

WebDriverException: Message: Parameters were incorrect. We wanted {"required":["desiredCapabilities"],"optional":["requiredCapabilities","sessionId","id"]} and you sent ["capabilities","desiredCapabilities"]

Process finished with exit code 1