如何单击 For Loop (Python Selenium) 下的搜索按钮答案

【问题标题】：How to click on Search button under For Loop (Python Selenium)如何单击 For Loop (Python Selenium) 下的搜索按钮
【发布时间】：2020-08-01 02:04:48
【问题描述】：

我希望我可以在下拉菜单中选择所有股票，点击“搜索”按钮并点击“导出为 CSV”按钮。但是，我被卡在选择选项后无法点击“搜索”按钮。请指教。谢谢

   from selenium import webdriver
   from selenium.webdriver.support.ui import Select, WebDriverWait
   from selenium.webdriver.common.by import By
   from selenium.webdriver.support import expected_conditions as EC
   from time import ctime

   browser = webdriver.Chrome()
   browser.get("https://www.hkex.com.hk/eng/sorc/options/statistics_hv_iv.aspx")

   select = Select(WebDriverWait(browser, 10).until(EC.element_to_be_clickable((By.XPATH,        
    "//select[@id='underlying']"))))


   browser.implicitly_wait(10)
   optionsList = []

   #iterate over the options, place attribute value in list
   for option in select.options:
       option.click()
       optionsList.append(option.get_attribute("value"))

       # below code is not able to work properly but this is only what I am hoping to work
       elem = browser.find_element_by_link_text("Search")
       elem.click()
       elem1 = driver.find_element_by_link_text("Export to CSV")
       elem1.click()
       print(elem)

   print(optionsList)
   print(len(optionsList))


   browser.quit

【问题讨论】：

标签： python selenium xpath css-selectors webdriverwait

【解决方案1】：

你需要诱导WebDriverWait()并等待element_to_be_clickable()

单击Export to CSV 按钮时，页面将刷新，页面将不再可用，您将收到过时异常。为避免这种情况，您需要重新分配 for 循环内的元素。

代码：

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

browser = webdriver.Chrome()
browser.get("https://www.hkex.com.hk/eng/sorc/options/statistics_hv_iv.aspx")
browser.maximize_window()
select = Select(WebDriverWait(browser, 10).until(EC.element_to_be_clickable((By.XPATH,"//select[@id='underlying']"))))
optionsList = []
items=select.options
for i in range(len(items)):
    #re-assigned select elements again to avoid stale exception
    select = Select(WebDriverWait(browser, 30).until(EC.element_to_be_clickable((By.XPATH, "//select[@id='underlying']"))))
    items = select.options
    print(items[i].get_attribute("value"))
    select.select_by_value(items[i].get_attribute("value"))
    optionsList.append(items[i].get_attribute("value"))
    #click on search button
    WebDriverWait(browser,10).until(EC.element_to_be_clickable((By.XPATH,"//span[@class='floatleft']//a[@title='Search']"))).click()
    #click on download button
    WebDriverWait(browser, 10).until(EC.element_to_be_clickable((By.XPATH, "//a[@title='Export to CSV']"))).click()

print(optionsList)
print(len(optionsList))

【讨论】：

【解决方案2】：

点击一个选项，例如(00002) CLP 然后点击 Search 按钮，您可以将WebDriverWait 诱导为visibility_of_all_elements_located()，您可以使用以下任一Locator Strategies：

使用CSS_SELECTOR：

driver.get("https://www.hkex.com.hk/eng/sorc/options/statistics_hv_iv.aspx")
Select(WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "select#underlying")))).select_by_value("00002")
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "td a[title='Search']"))).click()

使用XPATH：

driver.get("https://www.hkex.com.hk/eng/sorc/options/statistics_hv_iv.aspx")
Select(WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//select[@id='underlying']")))).select_by_value("00002")
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//td//a[@title='Search']"))).click()

浏览器快照：

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

【讨论】：