在 python 中使用 selenium 查找和下载文件

Question

我尝试在网络上搜索类似的问题，但无法为我尝试访问的网站的这个特定元素找到答案。类似的方法适用于其他元素，因此请尝试获得一些帮助。

我想在 python 中使用 Selenium 下载位于“下载”按钮下的文件 https://www.sgx.com/derivatives/negotiated-large-trade

该按钮似乎位于：

<span class="table-action-label" title="Download" data-i18n="[title]sgx-table.toolbar.action-download;[text]sgx-table.toolbar.action-download" data-i18n-options="{}">Download</span>

我的代码是

import selenium
from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

from fake_useragent import UserAgent

ua = UserAgent()
ua_rand = ua.random

print(ua_rand)


dcap = dict(DesiredCapabilities.PHANTOMJS)
dcap["phantomjs.page.settings.userAgent"] = ua_rand

browser = webdriver.PhantomJS("C://, desired_capabilities=dcap)
browser.get("https://www.sgx.com/derivatives/negotiated-large-trade")

browser.find_element_by_xpath("//span[@class='table-action-label']").click()


browser.quit()

但它似乎没有找到元素

NoSuchElementException: {"errorMessage":"Unable to find element with xpath '//span[@class='table-action-label']'","request":{"headers":{"Accept":"application/json","Accept-Encoding":"identity","Content-Length":"119","Content-Type":"application/json

如何下​​载文件？

非常感谢

Answer 1

您是否尝试过使用此 xpath：/html/body/div[1]/main/div[1]/article/template-base/div/div/sgx-widgets-wrapper/widget-derivatives-nlt/section [1]/div[1]/sgx-table/sgx-table-toolbar/div[2]/span

Answer 2

要点击带有下载文本的元素，您需要：

• 为invisibility_of_element() 引入WebDriverWait sgx-loader。

• 诱导WebDriverWait为element_to_be_clickable()

• 您可以使用以下任一Locator Strategies：

  • 使用LINK_TEXT:

    driver.get("https://www.sgx.com/derivatives/negotiated-large-trade")
    WebDriverWait(driver, 20).until(EC.invisibility_of_element((By.TAG_NAME, "sgx-loader")))
    WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.LINK_TEXT, "Download"))).click()
    

  • 使用CSS_SELECTOR：

    driver.get("https://www.sgx.com/derivatives/negotiated-large-trade")
    WebDriverWait(driver, 20).until(EC.invisibility_of_element((By.TAG_NAME, "sgx-loader")))
    WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "span.table-action-label[title='Download']"))).click()
    

  • 使用XPATH:

    driver.get("https://www.sgx.com/derivatives/negotiated-large-trade")
    WebDriverWait(driver, 20).until(EC.invisibility_of_element((By.TAG_NAME, "sgx-loader")))    
    WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//span[@class='table-action-label' and @title='Download'][text()='Download']"))).click()
    

• 注意：您必须添加以下导入：

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

• 浏览器快照：

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参考文献

您可以在NoSuchElementException 上找到一些相关讨论：

• How to click on the anchor element when the spinner obscures it using Selenium and Python?
• Selenium invisibilityOf(element) method throwing NoSuchElementException + WebDriverWait.ignoring(NoSuchElementException.class) is not working

Answer 3

感谢你们的帮助，目前使用谷歌浏览器的一个版本如下。我仍在尝试使用 phantomJs 让它工作。

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

from fake_useragent import UserAgent

ua = UserAgent()
ua_rand = ua.random
driver2 = webdriver.Chrome(executable_path=r"C:\Users\chromedriver.exe")

driver2.get("https://www.sgx.com/derivatives/negotiated-large-trade")
WebDriverWait(driver2, 20).until(EC.invisibility_of_element((By.TAG_NAME, "sgx-loader"))) 
time.sleep(5)
print("Downloading...")   
WebDriverWait(driver2, 60).until(EC.element_to_be_clickable((By.XPATH, "//span[@class='table-action-label' and @title='Download'][text()='Download']"))).click()

time.sleep(3)

driver2.quit()