python中driver = webdriver.Chrome()报错

问题一

报错信息如下：

Traceback (most recent call last):
  File "C:\PycharmProjects\pythonProject\venv\lib\site-packages\selenium\webdriver\common\service.py", line 72, in start
    self.process = subprocess.Popen(cmd, env=self.env,
  File "C:\DEV_TOOL\python-3.9.4\Python39\lib\subprocess.py", line 951, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "C:\DEV_TOOL\python-3.9.4\Python39\lib\subprocess.py", line 1420, in _execute_child
    hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
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 "C:\PycharmProjects\pythonProject\hello.py", line 6, in <module>
    driver = webdriver.Chrome()
  File "C:\PycharmProjects\pythonProject\venv\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 73, in __init__
    self.service.start()
  File "C:\PycharmProjects\pythonProject\venv\lib\site-packages\selenium\webdriver\common\service.py", line 81, in start
    raise WebDriverException(
selenium.common.exceptions.WebDriverException: Message: 'chromedriver' executable needs to be in PATH. Please see https://sites.google.com/a/chromium.org/chromedriver/home

解决办法，将chromedriver.exe文件放在Python的根目录下：

问题二

问题描述：运行后浏览器一闪而过，而后提示报错信息，信息如下：

Traceback (most recent call last):
  File "C:\PycharmProjects\pythonProject\hello.py", line 6, in <module>
    driver = webdriver.Chrome()
  File "C:\PycharmProjects\pythonProject\venv\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 76, in __init__
    RemoteWebDriver.__init__(
  File "C:\PycharmProjects\pythonProject\venv\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 157, in __init__
    self.start_session(capabilities, browser_profile)
  File "C:\PycharmProjects\pythonProject\venv\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 252, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "C:\PycharmProjects\pythonProject\venv\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "C:\PycharmProjects\pythonProject\venv\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.SessionNotCreatedException: Message: session not created: This version of ChromeDriver only supports Chrome version 91
Current browser version is 90.0.4430.85 with binary path C:\Program Files\Google\Chrome\Application\chrome.exe

其实只要看最后一句：

This version of ChromeDriver only supports Chrome version 91
Current browser version is 90.0.4430.85 with binary path C:\Program Files\Google\Chrome\Application\chrome.exe

就是说chromedriver.exe版本太高，本地的chrom是90版本的，因此降低版本重新试了一下，就没有问题啦~