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如何使用預期條件檢查HTML中是否存在br
標記。這是HTML代碼:使用硒的預期條件
<br>
<a href="member.php?u=12455" rel="nofollow">Smatta</a>
<a>, </a>
<a href="member.php?u=14305" rel="nofollow">Nyunyu</a>
<a>, </a>
<a href="member.php?u=20892" rel="nofollow">moyo</a>
<a>, </a>
<a href="member.php?u=21040" rel="nofollow">Masikini_Jeuri</a>
<a>, </a>
<a href="member.php?u=27429" rel="nofollow">Job K</a>
<a>, </a>
<a href="member.php?u=38124" rel="nofollow">Adoe</a>
<a>, </a>
<a href="member.php?u=39196" rel="nofollow">enhe</a>
<a></a>
這是我的代碼。
wait = WebDriverWait(browser, 10)
wait.until(EC.visibility_of_element_located((By.XPATH, '//<br>')))
完整代碼。
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
browser = webdriver.PhantomJS()
browser.maximize_window()
browser.get("http://www.jamiiforums.com/kenyan-news/225589-kenyan-and-tanzanian-surburbs.html")
username = browser.find_element_by_id("navbar_username")
password = browser.find_element_by_name("vb_login_password_hint")
username.send_keys("MarioP")
password.send_keys("codeswitching")
browser.find_element_by_class_name("loginbutton").click()
wait = WebDriverWait(browser, 20)
wait.until(EC.visibility_of_element_located((By.XPATH, '//h2[contains(., "Redirecting")]')))
wait.until(EC.title_contains('Kenyan & Tanzanian'))
wait.until(EC.visibility_of_element_located((By.ID, 'postlist')))
browser.find_element_by_xpath('//div[@class="vbseo_liked"]/a[contains(@onclick, "return vbseoui.others_click(this)")]')
browser.find_element_by_class_name("vbseo_liked").click()
wait.until(EC.visibility_of_element_located((By.TAG_NAME, 'br')))
print (browser.page_source)
print 'success!!'
browser.close()
我這樣做的原因是因爲br標籤只出現在鏈接被點擊後。我試圖在點擊操作後獲取頁面源代碼,但它在點擊操作之前給了我頁面源代碼。我想在獲取頁面源代碼之前檢查br標籤的存在。
這是打印出的錯誤。
文件 「sele.py」,第29行,在 wait.until(EC.visibility_of_element_located((By.TAG_NAME, 'BR')))
感謝您的回覆。我這樣做的原因是因爲br標籤只在鏈接被點擊後纔出現。我試圖在點擊操作後獲取頁面源代碼,但它在點擊操作之前給了我頁面源代碼。我想在獲取頁面源代碼之前檢查br標籤的存在。我編輯了問題以包含我的代碼。 – user3078335 2015-03-31 14:40:35
@ user3078335好的,謝謝,如果你使用'presence_of_element_located'而不是'visibility_of_element_located'呢? – alecxe 2015-03-31 14:50:16
哦,好吧。我會嘗試。 – user3078335 2015-03-31 14:52:06