执行Appium测试脚本时出现AttributeError: can't set attribute错误求助

执行以下Appium自动化测试脚本时触发错误，已确认Appium Server已启动：

import time
import ScrollUtil

from appium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

desired_caps = {}
desired_caps['platformName'] = 'Android'
desired_caps['deviceName'] = 'Android'
desired_caps['appPackage'] = 'com.samsung.android.dialer'
desired_caps['appActivity'] = 'com.samsung.android.dialer.DialtactsActivity'

driver = webdriver.Remote('http://localhost:4723/wd/hub', desired_caps)
driver.implicitly_wait(10)
ScrollUtil.swipeUp(4,driver)
ScrollUtil.swipeDown(4,driver)
# driver.find_element_by_android_uiautomator(
#     'new UiScrollable(new UiSelector().scrollable(true).instance(0)).scrollIntoView(new UiSelector().textContains("Akash").instance(0))').click()

time.sleep(2)
driver.quit()

报错信息 #

self.capabilities = response.get('value')
AttributeError: can't set attribute

解决方法 #

这个错误大多是Appium Python客户端与Selenium版本不兼容导致——新版Selenium将capabilities设为只读属性，旧版Appium客户端仍尝试修改该属性。

• 调整依赖版本：
  要么降级Selenium到4.3.0及以下版本，要么升级Appium Python客户端至最新兼容版本，执行对应命令：

  # 降级Selenium
  pip uninstall selenium -y
  pip install selenium==4.3.0
  
  # 或升级Appium客户端
  pip install --upgrade Appium-Python-Client
  

• 改用Options对象初始化Driver：
  针对新版Selenium，推荐使用UiAutomator2Options替代传统desired_caps传参，示例代码如下：

  import time
  import ScrollUtil
  
  from appium import webdriver
  from appium.options.android import UiAutomator2Options
  from selenium.webdriver.common.by import By
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.support import expected_conditions as EC
  
  options = UiAutomator2Options()
  options.platform_name = 'Android'
  options.device_name = 'Android'
  options.app_package = 'com.samsung.android.dialer'
  options.app_activity = 'com.samsung.android.dialer.DialtactsActivity'
  
  driver = webdriver.Remote('http://localhost:4723/wd/hub', options=options)
  driver.implicitly_wait(10)
  ScrollUtil.swipeUp(4,driver)
  ScrollUtil.swipeDown(4,driver)
  
  time.sleep(2)
  driver.quit()
  

• 检查ScrollUtil模块：
  确保自定义的ScrollUtil模块未调用已废弃的Selenium/Appium属性或方法，避免引发额外兼容性问题。

内容的提问来源于stack exchange，提问作者pplhung