网页常常会因为网络原因,程序问题等等导致打开网页慢,一直在那里打圈圈。
出现这种情况时网页里的很多元素就没有加载完成,如果你刚好要定位的元素没有加载完,这时定位的话程序就会抛出异常。
1.time.sleep()方法
2.WebDriverWait()显示等待
#coding=utf-8
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
import time
driver = webdriver.Chrome(executable_path="C:/chromedriver.exe")
driver.get('https://www.baidu.com')
try:
element = WebDriverWait(driver, 10).until(
EC.presence_of_element_located((By.CLASS_NAME, "search-show"))
)
element.click()
finally:
time.sleep(10)
driver.quit()
3.implicitly_wait()隐式等待
#coding=utf-8
from selenium import webdriver
driver = webdriver.Chrome(executable_path="C:/chromedriver.exe")
#等待5秒
driver.implicitly_wait(5)
driver.get('https://www.yuanrenxue.com')
driver.find_element_by_class_name('slide-left').click()
driver.quit()