硒阅读链接作为列表？

问题描述

作为Selenium练习（仍在学习如何使用它），我一直试图使其以无头模式打开chrome，请访问以下网站：https://adobe-flash-player.en.softonic.com/download，然后单击该下载按钮（“免费下载Windows版”）。

这是我的代码：

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
import os

options= Options()
options.headless=True
options.add_argument("--window-size=1920x1080")

chrome_driver = os.getcwd() +"\\chromedriver.exe"
print(os.getcwd())
driver = webdriver.Chrome(options=options,executable_path=chrome_driver)
driver.get("https://adobe-flash-player.en.softonic.com/download")
lucky_button = driver.find_elements_by_class_name("btn btn--medium btn--free-download mb-s track-btn-download")
print(lucky_button)
lucky_button.click()

出现错误：

Traceback (most recent call last):
  File "C:/Users/aniru/AppData/Local/Programs/Python/Python38-32/falsdwn.py",line 15,in <module>
    lucky_button.click()
AttributeError: 'list' object has no attribute 'click'

似乎正在将该按钮读取为列表，但是如果是这样，我无法理解为什么。我将如何解决这个问题，为什么会这样？

解决方法

要点击下载按钮，请使用以下任一CSS选择器。

代码：

lucky_button = driver.find_element_by_css_selector(".btn.btn--medium.btn--free-download.mb-s.track-btn-download")
lucky_button.click()

OR

lucky_button=driver.find_element_by_css_selector("a[data-auto='download-button']")
lucky_button.click()

---

更新：

诱导WebDriverWait（）并等待visibility_of_element_located（）并诱使javascript执行程序单击该按钮。

lucky_button=WebDriverWait(driver,10).until(EC.visibility_of_element_located((By.CSS_SELECTOR,".btn.btn--medium.btn--free-download.mb-s.track-btn-download")))
driver.execute_script("arguments[0].click();",lucky_button)

您需要导入以下库。

from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

---

更新：

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

options = webdriver.ChromeOptions()
options.add_argument("headless")
options.add_argument("--window-size=1920x1080")

driver = webdriver.Chrome(chrome_options=options)
#provide your download path
driver.execute_cdp_cmd('Page.setDownloadBehavior',{'behavior': 'allow','downloadPath': r'D:\kk\Downloads'}) 
driver.get("https://adobe-flash-player.en.softonic.com/download") 

download_button=WebDriverWait(driver,download_button)
print("Done")

您可以在此处找到讨论的链接Downloading file in headless mode

,

要以无头模式打开Chrome，我使用：

options = webdriver.ChromeOptions()
options.add_argument("headless")

第二个问题（您的例外情况）：

lucky_button = driver.find_elements_by_class_name("btn btn--medium btn--free-download mb-s track-btn-download")
if len(lucky_button): # found at least one
    lucky_button[0].click() # use first one

更新

我不确定为什么您的find_elements_by_class_name无法正常工作。但是，这似乎确实找到了可点击的内容（不幸的是，但并非始终如此）：

lucky_buttons = driver.find_elements_by_partial_link_text('Free Download')

所以代替：

lucky_buttons[0].click()

使用：

driver.execute_script("arguments[0].click();",lucky_buttons[0])

我使用的完整代码：

from selenium import webdriver

options= webdriver.ChromeOptions()
#options.headless=True
options.add_argument("--window-size=1920x1080")

driver = webdriver.Chrome(options=options)
try:
    driver.implicitly_wait(5)
    driver.get("https://adobe-flash-player.en.softonic.com/download")
    lucky_buttons = driver.find_elements_by_partial_link_text('Free Download')
    print(lucky_buttons)
    if len(lucky_buttons):
        driver.execute_script("arguments[0].click();",lucky_buttons[0])
finally:
    input('pausing ...')
    driver.quit()

更新2

from selenium import webdriver

options= webdriver.ChromeOptions()
options.headless=True
options.add_experimental_option('excludeSwitches',['enable-logging'])
options.add_argument("--window-size=1920x1080")

driver = webdriver.Chrome(options=options)
try:
    driver.implicitly_wait(5)
    driver.get("https://adobe-flash-player.en.softonic.com/download")
    lucky_buttons = driver.find_elements_by_partial_link_text('Free Download')
    print(lucky_buttons)
    if len(lucky_buttons):
        driver.execute_script("arguments[0].click();",lucky_buttons[0])
        elements = driver.find_elements_by_class_name('message-download__title')
        print('elements =',elements)
finally:
    driver.quit()

打印：

[<selenium.webdriver.remote.webelement.WebElement (session="d1ed56ed6e0f43a470f0a24f1a4ba798",element="8e88c2a7-633d-4df9-b0de-e5e27ddc21b3")>]
elements = [<selenium.webdriver.remote.webelement.WebElement (session="d1ed56ed6e0f43a470f0a24f1a4ba798",element="66acebf6-4971-42c5-9395-1c7913b5effd")>]