为什么即使在通过 Selenium 和 Python 使用 ChromeDriverManager 后，PATH 中的 'chromedriver' 也不是可执行文件

Question

我正在尝试使用此代码块单击“启动地球”按钮。

from selenium import webdriver
from webdriver_manager.chrome import ChromeDriverManager

driver = webdriver.Chrome(ChromeDriverManager().install())
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import Web
from selenium.webdriver.support import expected_conditions as EC
url = 'https://www.google.com/earth/'
driver = webdriver.chrome()
driver.get(url)
wait = WebDriverWait(driver, 10)
launchEarthButton = wait.until(EC.element_to_be_clickable((By.XPATH, '/html/body/header/div/nav[1]/ul[2]/li[2]/a/span/span' ))
launchEarthButton.click()

但是，我收到以下错误消息。怎么了？作为参考，我使用的是 MacOs 计算机。我之前遇到过路径错误的问题，但我用 ChromeDriverManager 解决了它。

FileNotFoundError                         Traceback (most recent call last)
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/selenium/webdriver/common/service.py in start(self)
     71             cmd.extend(self.command_line_args())
---> 72             self.process = subprocess.Popen(cmd, env=self.env,
     73                                             close_fds=platform.system() != 'Windows',

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/subprocess.py in __init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags, restore_signals, start_new_session, pass_fds, encoding, errors, text)
    853 
--> 854             self._execute_child(args, executable, preexec_fn, close_fds,
    855                                 pass_fds, cwd, env,

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/subprocess.py in _execute_child(self, args, executable, preexec_fn, close_fds, pass_fds, cwd, env, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite, restore_signals, start_new_session)
   1701                         err_msg = os.strerror(errno_num)
-> 1702                     raise child_exception_type(errno_num, err_msg, err_filename)
   1703                 raise child_exception_type(err_msg)

FileNotFoundError: [Errno 2] No such file or directory: 'chromedriver'

During handling of the above exception, another exception occurred:

WebDriverException                        Traceback (most recent call last)
<ipython-input-9-940dd1aefbaf> in <module>
      7 from selenium.webdriver.support import expected_conditions as EC
      8 url = 'https://www.google.com/earth/'
----> 9 driver = webdriver.Chrome()
     10 driver.get(url)
     11 wait = WebDriverWait(driver, 10)

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/selenium/webdriver/chrome/webdriver.py in __init__(self, executable_path, port, options, service_args, desired_capabilities, service_log_path, chrome_options, keep_alive)
     71             service_args=service_args,
     72             log_path=service_log_path)
---> 73         self.service.start()
     74 
     75         try:

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/selenium/webdriver/common/service.py in start(self)
     79         except OSError as err:
     80             if err.errno == errno.ENOENT:
---> 81                 raise WebDriverException(
     82                     "'%s' executable needs to be in PATH. %s" % (
     83                         os.path.basename(self.path), self.start_error_message)

WebDriverException: Message: 'chromedriver' executable needs to be in PATH. Please see https://sites.google.com/a/chromium.org/chromedriver/home

Answer 1

你很接近。如您所用：

driver = webdriver.Chrome(ChromeDriverManager().install())

缓存/下载 will be used to initiate a new google-chrome浏览上下文.

因此您需要删除 driver = webdriver.Chrome()

的第二个实例