我的代码：
from selenium import webdriver
import selenium.webdriver.support.ui as ui
import time
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
driver = webdriver.Firefox()
driver.get("https://www.youtube.com")
login_wait = WebDriverWait(driver, 10)
textbox = login_wait.until(EC.visibility_of_element_located((By.ID, 'search')))
textbox.send_keys("a")
time.sleep(10)
driver.close()
在Python控制台中没有错误，但geckodriver.log：
1514074507756 geckodriver INFO geckodriver 0.19.1
1514074507763 geckodriver INFO Listening on 127.0.0.1:49865
1514074508870 mozrunner::runner INFO Running command: "/Applications/Firefox.app/Contents/MacOS/firefox-bin" "-marionette" "-profile" "/var/folders/kf/8800phd97vx28vtzdytqk1m80000gn/T/rust_mozprofile.oI7AzEUKweAr"
1514074509913 Marionette ERROR Error on starting server: [Exception... "Component returned failure code: 0x804b0036 (NS_ERROR_SOCKET_ADDRESS_IN_USE) [nsIServerSocket.initSpecialConnection]" nsresult: "0x804b0036 (NS_ERROR_SOCKET_ADDRESS_IN_USE)" location: "JS frame :: chrome://marionette/content/server.js :: MarionetteServer.prototype.start :: line 95" data: no]
[Exception... "Component returned failure code: 0x804b0036 (NS_ERROR_SOCKET_ADDRESS_IN_USE) [nsIServerSocket.initSpecialConnection]" nsresult: "0x804b0036 (NS_ERROR_SOCKET_ADDRESS_IN_USE)" location: "JS frame :: chrome://marionette/content/server.js :: MarionetteServer.prototype.start :: line 95" data: no]
MarionetteServer.prototype.start@chrome://marionette/content/server.js:95:19
MarionetteComponent.prototype.init@jar:file:///Applications/Firefox.app/Contents/Resources/omni.ja!/components/marionette.js:217:5
MarionetteComponent.prototype.handle@jar:file:///Applications/Firefox.app/Contents/Resources/omni.ja!/components/marionette.js:112:5
2017-12-23 19:15:11.556 plugin-container[42994:4077314] *** CFMessagePort: bootstrap_register(): failed 1100 (0x44c) 'Permission denied', port = 0x9b3b, name = 'com.apple.tsm.portname'
See /usr/include/servers/bootstrap_defs.h for the error codes.
2017-12-23 19:15:11.559 plugin-container[42994:4077314] *** CFMessagePort: bootstrap_register(): failed 1100 (0x44c) 'Permission denied', port = 0x9e03, name = 'com.apple.CFPasteboardClient'
See /usr/include/servers/bootstrap_defs.h for the error codes.
最佳答案
如果您查看错误堆栈跟踪，则错误说明了一切：
1514074509913 Marionette ERROR Error on starting server: [Exception... "Component returned failure code: 0x804b0036 (NS_ERROR_SOCKET_ADDRESS_IN_USE) [nsIServerSocket.initSpecialConnection]" nsresult: "0x804b0036 (NS_ERROR_SOCKET_ADDRESS_IN_USE)" location: "JS frame :: chrome://marionette/content/server.js :: MarionetteServer.prototype.start :: line 95" data: no]
这实质上意味着
Marionette试图通过端口localhost在您的127.0.0.1上建立连接，即49865，但是由于以下原因之一，当前端口已被占用：Port 49865当前正在由localhost用尽的其他一些应用程序使用。Port 49865由localhost运行的某些服务使用。Port 49865尚未由WebDriver变体的悬空实例释放，例如GeckoDriver，ChromeDriver，IEDriverServer或GhostDriver。解决方案：
解决方案是以下所有步骤之一：
始终在
driver.quit()的tearDown()方法中使用Automation Script。如果
WebDriver变体的任何悬空实例，例如系统上存在GeckoDriver，ChromeDriver，IEDriverServer或GhostDriver，请通过编程/手动将其杀死。确保在
Port 49865用尽的其他任何应用程序中均不使用localhost。确保从您的
Port 49865运行的某些服务未使用localhost。在执行
CCleaner之前和之后使用Tests工具清除系统上的操作系统杂项。取一个
System Reboot如果问题仍然存在，请通过
uninstall通过Mozilla Firefox Browser Revo Uninstaller并安装Mozilla Firefox Browser的新实例关于selenium - NS_ERROR_SOCKET_ADDRESS_IN_USE，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/47957107/