在 python 中使用 selenium 查找和下載文件

Question

我嘗試在 web 上搜索類似問題，但找不到我要訪問的網站的這個特定元素的答案。 類似的方法適用於其他元素，因此請嘗試獲得一些幫助。

我想使用 python https://www.sgx.com/derivatives/negotiated-large-trade中的 Selenium 下載位於“下載”按鈕下的文件

該按鈕似乎位於：

<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>

我的代碼是

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()

但它似乎沒有找到元素

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

我怎樣才能下載文件？

非常感謝

Answer 1

你試過用這個 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

要單擊帶有文本作為下載的元素，您需要：

• 為invisibility_of_element() sgx-loader 引入WebDriverWait 。

• 為element_to_be_clickable()引入WebDriverWait

• 您可以使用以下任一定位器策略：

  • 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：您必須添加以下導入：

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

• 瀏覽器快照：

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參考

您可以在以下位置找到一些關於NoSuchElementException的相關討論：

• 當微調器使用 Selenium 和 Python 遮擋錨元素時，如何單擊錨元素？
• Selenium invisibilityOf(element) 方法拋出 NoSuchElementException + WebDriverWait.ignoring(NoSuchElementException.class) 不起作用

Answer 3

謝謝你們的幫助，到目前為止，使用谷歌瀏覽器的一個版本如下。 我仍在嘗試使用 phantomJs 讓它工作。

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()