python3+selenium配置可能报错记录

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
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "D: estpython3libsite-packagesseleniumwebdriverfirefoxwebdriver.py", line 145, in __init__
    self.service.start()
  File "D: estpython3libsite-packagesseleniumwebdrivercommonservice.py", line 81, in start
    os.path.basename(self.path), self.start_error_message)
selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH.
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: estpython3libsite-packagesseleniumwebdriverfirefoxwebdriver.py", line 155, in __init__
    keep_alive=True)
  File "D: estpython3libsite-packagesseleniumwebdriver emotewebdriver.py", line 92, in __init__
    self.start_session(desired_capabilities, browser_profile)

  File "D: estpython3libsite-packagesseleniumwebdriver emotewebdriver.py", line 179, in start_session
    response = self.execute(Command.NEW_SESSION, capabilities)
  File "D: estpython3libsite-packagesseleniumwebdriver emotewebdriver.py", line 238, in execute
    self.error_handler.check_response(response)
  File "D: estpython3libsite-packagesseleniumwebdriver emoteerrorhandler.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: estpython3libsite-packagesseleniumwebdriverfirefoxwebdriver.py", line 155, in __init__
    keep_alive=True)
  File "D: estpython3libsite-packagesseleniumwebdriver emotewebdriver.py", line 92, in __init__
    self.start_session(desired_capabilities, browser_profile)
  File "D: estpython3libsite-packagesseleniumwebdriver emotewebdriver.py", line 179, in start_session
    response = self.execute(Command.NEW_SESSION, capabilities)
  File "D: estpython3libsite-packagesseleniumwebdriver emotewebdriver.py", line 238, in execute
    self.error_handler.check_response(response)
  File "D: estpython3libsite-packagesseleniumwebdriver emoteerrorhandler.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: estpython3libsite-packagesseleniumwebdriverfirefoxwebdriver.py”, line 170, in init
keep_alive=True)
File “D: estpython3libsite-packagesseleniumwebdriverfirefoxwebdriver.py”, line 156, in init
self.start_session(capabilities, browser_profile)
File “D: estpython3libsite-packagesseleniumwebdriverfirefoxwebdriver.py”, line 245, in start_session
response = self.execute(Command.NEW_SESSION, parameters)
File “D: estpython3libsite-packagesseleniumwebdriverfirefoxwebdriver.py”, line 314, in execute
self.error_handler.check_response(response)
File “D: estpython3libsite-packagesseleniumwebdriverfirefoxerrorhandler.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