我正在尝试学习使用Selenium进行Web抓取，但是通过简单的代码和设置不断出现错误。我遵循了许多指南，但在debian 9.7 Stretch服务器上似乎仍然出现相同的错误
设置铬：
铬：
sudo apt-get install python-pip
sudo pip install selenium
LATEST=$(wget -q -O - http://chromedriver.storage.googleapis.com/LATEST_RELEASE)
wget http://chromedriver.storage.googleapis.com/$LATEST/chromedriver_linux64.zip
unzip chromedriver_linux64.zip && sudo ln -s $PWD/chromedriver /usr/local/bin/chromedriver
export PATH=$PATH:/usr/local/bin/
脚本：
#!/usr/bin/env python
from selenium import webdriver
browser = webdriver.Chrome()
browser.get('http://www.ubuntu.com/')
错误：
python3 testchrome.py
Traceback (most recent call last):
File "testchrome.py", line 4, in <module>
browser = webdriver.Chrome()
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/chrome/webdriver.py", line 73, in __init__
self.service.start()
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/common/service.py", line 98, in start
self.assert_process_still_running()
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/common/service.py", line 111, in assert_process_still_running
% (self.path, return_code)
selenium.common.exceptions.WebDriverException: Message: Service chromedriver unexpectedly exited. Status code was: 127
（也尝试使用python2.7）
设置FIREFOX：
FIREFOX：
wget https://github.com/mozilla/geckodriver/releases/download/v0.11.1/geckodriver-v0.11.1-linux64.tar.gz
tar -xvzf geckodriver-v0.11.1-linux64.tar.gz
rm geckodriver-v0.11.1-linux64.tar.gz
chmod +x geckodriver
cp geckodriver /usr/local/bin/
export PATH=$PATH:/usr/local/bin/
脚本：
#!/usr/bin/env python
from selenium import webdriver
browser = webdriver.Firefox()
browser.get('http://www.ubuntu.com/')
错误：
python3 test.py
Traceback (most recent call last):
File "test.py", line 5, in <module>
browser = webdriver.Firefox()
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/firefox/webdriver.py", line 174, in __init__
keep_alive=True)
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
self.start_session(capabilities, browser_profile)
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
response = self.execute(Command.NEW_SESSION, parameters)
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
self.error_handler.check_response(response)
File "/usr/local/lib/python3.5/dist-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line
我曾尝试使用apt -y install firefox-esr安装firefox-esr，但存在相同的错误。
感谢任何帮助，因为我想继续构建代码。谢谢