python基础教程Python3+selenium配置常见报错解决方案

系统管理员 2022-12-19 11:47 270阅读 0赞

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**第一个坑：'geckodriver' executable needs to be in PATH**

1.如果启动浏览器过程中报如下错误

2.这个是因为最新的selenium3.0启动firefox需要geckodriver.exe这个驱动文件。

3.下载之后，配置到环境变量path下（可以直接放python根目录）

**第二坑：Expected browser binary location, but unable to find binary in default location**

1.如果启动浏览器过程中报如下错误：

> Traceback (most recent call last):  
> File "<stdin>", line 1, in <module>  
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\firefox\\webdriver.py", line 155, in \_\_init\_\_  
> keep\_alive=True)  
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\remote\\webdriver.py", line 92, in \_\_init\_\_  
> self.start\_session(desired\_capabilities, browser\_profile)
> 
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\remote\\webdriver.py", line 179, in start\_session  
> response = self.execute(Command.NEW\_SESSION, capabilities)  
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\remote\\webdriver.py", line 238, in execute  
> self.error\_handler.check\_response(response)  
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\remote\\errorhandler.py", line 193, in check\_response  
> raise exception\_class(message, screen, stacktrace)  
> selenium.common.exceptions.WebDriverException: Message: Expected browser binary location, but unable to find binary in default location,  
> no 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line.

2.这个是因为firefox.exe这个文件也需要配置到环境变量path下。

3.这个路径就是安装完firefox后，找到firefox.exe这个文件的地址，加到path下。

**第三坑：Unsupported Marionette protocol version 2, required 3**

1.如果启动浏览器过程中出现如下错误

> Traceback (most recent call last):  
> File "<stdin>", line 1, in <module>
> 
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\firefox\\webdriver.py", line 155, in \_\_init\_\_  
> keep\_alive=True)  
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\remote\\webdriver.py", line 92, in \_\_init\_\_  
> self.start\_session(desired\_capabilities, browser\_profile)  
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\remote\\webdriver.py", line 179, in start\_session  
> response = self.execute(Command.NEW\_SESSION, capabilities)  
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\remote\\webdriver.py", line 238, in execute  
> self.error\_handler.check\_response(response)  
> File "D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\remote\\errorhandler.py", line 193, in check\_response
> 
> raise exception\_class(message, screen, stacktrace)  
> selenium.common.exceptions.WebDriverException: Message: Unsupported Marionette protocol version 2, required 3  
>

2.这个错误原因是firefox版本过低了，最新的selenium3.0版本支持firefox47以上的版本，升级版本就可以了

**第四坑：WebDriverException: Message: newSession**

1.Traceback (most recent call last):

> File “D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\firefox\\\\webdriver.py”, line 170, in init  
> keep\_alive=True)  
> File “D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\firefox\\\\webdriver.py”, line 156, in init  
> self.start\_session(capabilities, browser\_profile)  
> File “D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\firefox\\\\webdriver.py”, line 245, in start\_session  
> response = self.execute(Command.NEW\_SESSION, parameters)  
> File “D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\firefox\\\\webdriver.py”, line 314, in execute  
> self.error\_handler.check\_response(response)  
> File “D:\\test\\python3\\lib\\site-packages\\selenium\\webdriver\\firefox\\\\errorhandler.py”, line 242, in check\_response  
> raise exception\_class(message, screen, stacktrace)  
> selenium.common.exceptions.WebDriverException: Message: newSession

2.下载最新的geckodriver.exe 然后把它放到python的安装目录下

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