想要使用Selenium和python下载数据

Question

嗨，我想从Link下载数据  我要从“ SA”区域下载数据的位置。我尝试了以下代码，在选择“ SA”标签后，我想单击“ 30分钟”标签上方的下载箭头。

chromedriver = "/usr/lib/chromium-browser/chromedriver"
driver = webdriver.Chrome(chromedriver)
driver.get('https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data-dashboard#price-demand')
time.sleep(5)
driver.find_element_by_xpath("//*[@class='au-target btn btn-default btn-lg active' and text()='SA']").click()
button = driver.find_element_by_xpath("//button[@class='btn btn-default au-target' and click.trigger='clickDownload($event)']")
button.click()

但是它会引发错误

  

消息：否这样的元素：无法找到元素：   {“ method”：“ xpath”，“ selector”：“ // * [@ class ='au-target btn btn-default   btn-lg active'和text（）='SA']“}

您可以通过访问链接获取xpath。

谢谢。

Answer 1

一旦您访问 url https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data-dashboard#price-demand以下载所需的数据，就需要：

• 诱导 WebDriverWait 以使所需的框架可用并切换到它。
• 为 WebDriverWait 提供所需的元素，其文本为 SA ，以便单击。
• 再次诱导 WebDriverWait 以使所需元素可单击。
• 您可以使用以下解决方案：

• 代码块：

  from selenium import webdriver
  from selenium.webdriver.chrome.options import Options
  from selenium.webdriver.common.by import By
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.support import expected_conditions as EC
  
  options = Options()
  options.add_argument("start-maximized")
  options.add_argument("disable-infobars")
  options.add_argument("--disable-extensions")
  driver = webdriver.Chrome(chrome_options=options, executable_path=r'C:\Utility\BrowserDrivers\chromedriver.exe')
  driver.get('https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data-dashboard#price-demand')
  WebDriverWait(driver, 10).until(EC.frame_to_be_available_and_switch_to_it((By.XPATH,"//iframe[@class='iframe-dashboard-MTO' and@src='/aemo/apps/visualisations/elec-nem-priceanddemand.html']")))
  WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, "//button[@class='au-target btn btn-default btn-lg' and contains(.,'SA')]"))).click()
  WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, "//div[@class='btn-group']//following::button[1]/i[@class='icon-download']"))).click()
  

• 浏览器快照：

Answer 2

两个按钮都位于iframe内，因此您应该在单击按钮之前切换到该框架：

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

driver.switch_to.frame(driver.find_element_by_class_name('iframe-dashboard-MTO'))
wait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, "//button[text()='SA']"))).click()
wait(driver, 10).until(EC.element_to_be_clickable((By.CLASS_NAME, 'icon-download'))).click()