FileNotFoundError: [Errno 2] 没有这样的文件或目录:

Question

我创建了一个测试脚本来使用 python 在 Eclipse 中打开一个 url 并得到以下错误：

Traceback (most recent call last):

  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/selenium/webdriver/common/service.py", line 76, in start

    stdin=PIPE)

  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 769, in __init__

    restore_signals, start_new_session)

  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 1516, in _execute_child

    raise child_exception_type(errno_num, err_msg, err_filename)

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

在处理上述异常的过程中，又发生了一个异常：

Traceback (most recent call last):

  File "/Applications/Eclipse.app/Contents/MacOS/C:\EclipseWorkspaces\csse120/PythonSeleniumProject/src/PythonSeleniumModule.py", line 13, in <module>

    driver = webdriver.Firefox()

  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 164, in __init__

    self.service.start()

  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/selenium/webdriver/common/service.py", line 83, in start

    os.path.basename(self.path), self.start_error_message)

selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH. 

我已经阅读了有关相关主题的堆栈溢出，但没有一个能回答/解决我的问题。

请指教。谢谢你。