python配置求助

>>> from selenium import webdriver
>>> drive = webdriver.Chrome()
Traceback (most recent call last):
  File "C:\Users\koko\AppData\Local\Programs\Python\Python37\lib\site-packages\selenium\webdriver\common\service.py", line 76, in start
    stdin=PIPE)
  File "C:\Users\koko\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 728, in __init__
    errread, errwrite) = self._get_handles(stdin, stdout, stderr)
  File "C:\Users\koko\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 1052, in _get_handles
    c2pwrite = msvcrt.get_osfhandle(self._get_devnull())
  File "C:\Users\koko\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 867, in _get_devnull
    self._devnull = os.open(os.devnull, os.O_RDWR)
FileNotFoundError: [Errno 2] No such file or directory: 'nul'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    drive = webdriver.Chrome()
  File "C:\Users\koko\AppData\Local\Programs\Python\Python37\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 73, in __init__
    self.service.start()
  File "C:\Users\koko\AppData\Local\Programs\Python\Python37\lib\site-packages\selenium\webdriver\common\service.py", line 83, in start
    os.path.basename(self.path), self.start_error_message)
selenium.common.excepti**.WebDriverException: Message: 'chromedriver' executable needs to be in PATH. Please see https://sites.google.com/a/chromium.org/chromedriver/home

浏览器驱动是要另外下载的，且版本需要配合浏览器版本，然后加参数executpath='驱动文件所在目录'