第二十九节 selenium隐式和显式等待

 1 from selenium import webdriver
 2 from selenium.webdriver.chrome.options import Options
 3 
 4 
 5 browers_path = r'C:UsersAdministratorAppDataLocal360ChromeChromeApplication360chrome.exe'
 6 chrome_option = Options()
 7 chrome_option.binary_location = browers_path
 8 browers_driver = webdriver.Chrome(options=chrome_option)
 9 browers_driver.get("http://www.baidu.com")
10 
11 '''
12 隐式等待
13 会等待指定时间，不管这个元素有没有刷新或者获取到
14 '''
15 # browers_driver.implicitly_wait(20)
16 # browers_driver.find_element_by_id('12342435')
17 
18 '''
19 显式等待:如果在限定条件下去到了元素就会结束程序，否则会等到规定限定时间抛出错误
20 '''
21 from selenium.webdriver.support.ui import WebDriverWait
22 from selenium.webdriver.support import expected_conditions as EC
23 from selenium.webdriver.common.by import By
24 #
25 elment = WebDriverWait(browers_driver,10).until(
26     EC.presence_of_element_located((By.NAME,'wd'))#只能传一个参数，因此要放进一个元组中
27 )
28 
29 print(elment)