python selenium中的多线程

Question

我想同时打开和登录 5 个选项卡，而在选项卡之间没有延迟。我试过了：

import threading
import time
from selenium import webdriver
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

def openurl(threadId):
    print(threading.currentThread().getName(),' Thread')
    url = ('https://www.facebook.com/')
    print(url)
    driver.execute_script("window.open('{0}')".format(url))
    #driver.title(threadId)
    time.sleep(0.1)

    driver.set_window_size(920, 680)
    driver.find_element(By.ID, "email").send_keys("xx")
    driver.find_element(By.ID, "pass").send_keys("yy")
    driver.find_element(By.ID, "loginbutton").click()


if __name__=='__main__':
    driver = webdriver.Chrome()
    windows_before  = driver.current_window_handle
    for i in range(5):
        t1 = threading.Thread(name=i,target=openurl, args=(i,))
        t1.start()
        t1.join()

但它正在抛出：

回溯（最近一次调用）：文件“C:\Users\1024983\AppData\Local\Programs\Python\Python37\lib\threading.py”，第 870 行，运行 self._target(*self._args, ** self._kwargs) 文件“C:\Users\1024983\AppData\Local\Programs\Python\Python37\fb-thread.py”，第 30 行，在 openurl driver.find_element(By.ID, "email").send_keys( “xx”）文件引发异常类（消息，屏幕，堆栈跟踪）selenium.common.exceptions.NoSuchElementException：消息：没有这样的元素：无法定位元素：{“方法”：“css选择器”，“选择器”：“[id ="email"]"}（会话信息：chrome=78.0.3904.108）

如果我增加睡眠时间，标签之间会有延迟。我尝试使用driver.title进行导航，但所有选项卡的案例标题都相同。

Answer 1

该示例使用线程来运行单独的浏览器，这些浏览器填充表单并True在列表中设置buttons以通知login按钮已准备好单击。当所有浏览器都True在列表中设置buttons后，所有浏览器都单击按钮。

看起来它几乎是同时运行的 - 也许只有系统有一些可以同时建立如此多的连接。

我使用列表buttons来同步所有线程。每个线程都会获得编号，以便在列表中拥有自己的位置。我不使用，append(True)因为我不确定它是否可以是线程安全的。

import time
from selenium import webdriver
from threading import Thread

def func(number):
    driver = webdriver.Chrome()
    #driver.set_window_size(920, 680)
    driver.get(url)

    driver.find_element_by_id("email").send_keys("xx")
    driver.find_element_by_id("pass").send_keys("yy")
    b = driver.find_element_by_id("loginbutton")

    buttons[number] = True
    print(buttons)

    # wait for other buttons
    while not all(buttons):
        pass

    print('click', number)
    b.click()

# ---

url = 'https://www.facebook.com/'

number_of_threads = 5

#buttons = [False * number_of_threads] # create place 
buttons = []

threads = []

for number in range(number_of_threads):
    t = Thread(target=func, args=(number,)) # get number for place in list `buttons`
    t.start()
    threads.append(t)
    buttons.append(False) # create place 

for t in threads:
    t.join()

编辑：与 5 个线程相同，threading.Barrier(5)必须运行barrier.wait()才能继续前进。

import time
from selenium import webdriver
from threading import Thread, Barrier

def func(barrier):

    driver = webdriver.Chrome()
    #driver.set_window_size(920, 680)
    driver.get(url)

    driver.find_element_by_id("email").send_keys("xx")
    driver.find_element_by_id("pass").send_keys("yy")
    b = driver.find_element_by_id("loginbutton")

    print('wait for others')
    barrier.wait()

    print('click')
    b.click()

# ---

url = 'https://www.facebook.com/'

number_of_threads = 5

barrier = Barrier(number_of_threads)

threads = []

for _ in range(number_of_threads):
    t = Thread(target=func, args=(barrier,)) 
    t.start()
    threads.append(t)

for t in threads:
    t.join()