使用selenium报错

使用selenium# coding=utf-8
from  selenium import webdriver


driver = webdriver.Firefox()
driver.get("http://baidu.com")


driver.find_element_by_id("kw").send_keys("Selenium2")
driver.find_element_by_id("su").click()
driver.quit()

执行报错，报错详情：

Traceback (most recent call last):
  File "C:\python\lib\site-packages\selenium\webdriver\common\service.py", line 74, in start
    stdout=self.log_file, stderr=self.log_file)
  File "C:\python\lib\subprocess.py", line 707, in __init__
    restore_signals, start_new_session)
  File "C:\python\lib\subprocess.py", line 990, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] 系统找不到指定的文件。


During handling of the above exception, another exception occurred:


Traceback (most recent call last):
  File "E:\pythontest\baidu.py", line 4, in <module>
    driver = webdriver.Firefox()
  File "C:\python\lib\site-packages\selenium\webdriver\firefox\webdriver.py", line 142, in __init__
    self.service.start()
  File "C:\python\lib\site-packages\selenium\webdriver\common\service.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. 

百度查看需要下载Firefox驱动，下载geckodriver.exe放置位置Windows： python安装根目录（与python.exe 同一目录）

：

安装好驱动，火狐浏览器打开但是没有输入selenium2关键字，且报错

Traceback (most recent call last):
  File "E:\pythontest\baidu.py", line 7, in <module>
    driver.find_element_by_id("kw").send_keys("Selenium2")
  File "C:\python\lib\site-packages\selenium\webdriver\remote\webelement.py", line 349, in send_keys
    'value': keys_to_typing(value)})
  File "C:\python\lib\site-packages\selenium\webdriver\remote\webelement.py", line 493, in _execute
    return self._parent.execute(command, params)
  File "C:\python\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 252, in execute
    self.error_handler.check_response(response)
  File "C:\python\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 194, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: Expected [object Undefined] undefined to be a string

百度答案，火狐浏览器自身问题，版本太高，需要降低火狐浏览器的版本，未做尝试.........