为什么 selenium 没有成功点击我的下载链接？

Question

我正在尝试使用 selenium 从网站下载 excel 文件。我不确定为什么代码不允许我下载它。我得到一个退出代码 0，所以一切都运行成功，但我没有在我的下载中看到该文件。

from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from webdriver_manager.chrome import ChromeDriverManager
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC



def scrape_mclellan_website():
    url = 'https://www.mcoscillator.com/market_breadth_data/'
    s = Service(ChromeDriverManager().install())
    op = webdriver.ChromeOptions()
    op.add_argument('headless')
    driver = webdriver.Chrome(service=s)

    driver.get(url)
    download_link = driver.find_element(by=By.XPATH, value='//*[@id="data_table"]/a[1]/img')
    download_link.click()

scrape_mclellan_website()

Answer 1

如何解决？

等到您尝试单击的元素出现，然后单击<a> 而不是<img>：

download_link = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.XPATH, '//*[@id="data_table"]/a[1]')))
download_link.click()

设置您对下载文件夹的偏好并注意窗口是否以正确的大小打开：

prefs = {'download.default_directory':'ENTER PATH TO DOWNLOAD FOLDER'}
options = webdriver.ChromeOptions()
options.add_argument("--window-size=1920,1080")
options.add_argument("--start-maximized")
options.add_argument("--headless")
options.add_experimental_option("prefs",prefs)

示例（硒 4）

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

service = Service(executable_path='ENTER YOUR PATH TO CHROMEDRIVER')
prefs = {'download.default_directory':'ENTER PATH TO DOWNLOAD FOLDER'}
options = webdriver.ChromeOptions()
options.add_argument("--window-size=1920,1080")
options.add_argument("--start-maximized")
options.add_argument("--headless")
options.add_experimental_option("prefs",prefs)
driver = webdriver.Chrome(service=service, options=options)
driver.get('https://www.mcoscillator.com/market_breadth_data/')

download_link = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.XPATH, '//*[@id="data_table"]/a[1]')))
download_link.click()