首次安装好appium环境后运行显示Message: 'platformName' can't be blank

from appium import webdriver
import time
desired_caps = {
"paltformName":"Android",
"paltformVersion":"7.1.2",
"deviceName":"xiaomi",
"appPackage":"com.luhaisco.dywl",
"appActivity":"com.luhaisco.dywl.StartActivity",
"noReset":True
}
#2. appium server 进行启动
#3 发送指令给appium server
dirver = webdriver.Remote('http://127.0.0.1:4723/wd/hub',desired_caps)

单词写错了，老铁，类似这样：


import time

from appium import webdriver

# server 启动参数
desired_caps = {}
# 1.安卓系统
desired_caps['platformName'] = 'Android'
# 2.系统的版本号
desired_caps['platformVersion'] = '7.1'
# 3.手机名称，可通过命令：adb devices获取
desired_caps['deviceName'] = '127.0.0.1:62001'
# 4.应用程序的包名，也是app的包名，在手机中，包名是app的唯一标识
# 获取手机当前运行的程序和界面的名称
# adb shell dumpsys window windows | findstr mFocusedApp
desired_caps['appPackage'] = 'com.android.settings'
# 5.当前app里面的界面内容
desired_caps['appActivity'] = '.Settings'

# 从appium库里面导入driver对象
# driver = webdriver.Remomte('appium程序的地址','一个字典，要获取设置的要求')
driver = webdriver.Remote('http://127.0.0.1:4723/wd/hub', desired_caps)

执行后报错什么情况

Traceback (most recent call last):
File "C:/D2018/app自动化工程/lianxi/first_app.py", line 13, in
dirver = webdriver.Remote('http://127.0.0.1:4723/wd/hub',desired_caps)
File "C:\D2018\app自动化工程\venv\lib\site-packages\appium\webdriver\webdriver.py", line 235, in init
options=options,
File "C:\D2018\app自动化工程\venv\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 270, in init
self.start_session(capabilities, browser_profile)
File "C:\D2018\app自动化工程\venv\lib\site-packages\appium\webdriver\webdriver.py", line 320, in start_session
response = self.execute(RemoteCommand.NEW_SESSION, w3c_caps)
File "C:\D2018\app自动化工程\venv\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 428, in execute
self.error_handler.check_response(response)
File "C:\D2018\app自动化工程\venv\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 243, in check_response
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: An unknown server-side error occurred while processing the command. Original error: Error executing adbExec. Original error: 'Command 'C:\appium\android-sdk-windows\platform-tools\adb.exe -P 5037 -s 127.0.0.1:62001 install -r C:\Users\tarena\AppData\Local\Temp\202283-9676-1x9tas0.3uaa\appium-uiautomator2-server-v4.27.0.apk' timed out after 20000ms'. Try to increase the 20000ms adb execution timeout represented by 'uiautomator2ServerInstallTimeout' capability
Stacktrace:
UnknownError: An unknown server-side error occurred while processing the command. Original error: Error executing adbExec. Original error: 'Command 'C:\appium\android-sdk-windows\platform-tools\adb.exe -P 5037 -s 127.0.0.1:62001 install -r C:\Users\tarena\AppData\Local\Temp\202283-9676-1x9tas0.3uaa\appium-uiautomator2-server-v4.27.0.apk' timed out after 20000ms'. Try to increase the 20000ms adb execution timeout represented by 'uiautomator2ServerInstallTimeout' capability
at getResponseForW3CError (C:\Program Files\Appium Server GUI\resources\app\node_modules\appium\node_modules\appium-base-driver\lib\protocol\errors.js:804:9)
at asyncHandler (C:\Program Files\Appium Server GUI\resources\app\node_modules\appium\node_modules\appium-base-driver\lib\protocol\protocol.js:380:37)

首次安装好appium环境后 运行显示Message: 'platformName' can't be blank

首次安装好appium环境后运行显示Message: 'platformName' can't be blank