使用selenium判断标签的元素值是否存在

from selenium.common.exceptions import NoSuchElementException


# 封装一个函数，用来判断属性值是否存在
def isElementPresent(driver, path):
    """
    用来判断元素标签是否存在，
    """
    try:
        element = driver.find_element_by_xpath(path)
    # 原文是except NoSuchElementException, e:
    except NoSuchElementException as e:
        # 发生了NoSuchElementException异常，说明页面中未找到该元素，返回False
        return False
    else:
        # 没有发生异常，表示在页面中找到了该元素，返回True
        return True

写个刷bilibili火锅的脚本测试一下： 

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import json
from selenium.webdriver.support.ui import Select
import time

from selenium.common.exceptions import NoSuchElementException


# 封装一个函数，用来判断属性值是否存在
def isElementPresent(driver, path):
    """
    用来判断元素标签是否存在，
    """
    try:
        element = driver.find_element_by_xpath(path)
    # 原文是except NoSuchElementException, e:
    except NoSuchElementException as e:
        # 发生了NoSuchElementException异常，说明页面中未找到该元素，返回False
        return False
    else:
        # 没有发生异常，表示在页面中找到了该元素，返回True
        return True

driver = webdriver.Chrome()

def bilibili_yeah():

    while True:
        if isElementPresent(driver, '/html/body/div[9]/div/div/div/div[2]'):
            print("有X号")
            driver.find_element_by_xpath('/html/body/div[9]/div/div/div/div[2]').click()
            print(u"X点了")
        elif isElementPresent(driver, '//*[@id="app"]/article/div[3]/div[2]/div[2]/div[1]/div[1]/div[1]/div[5]'):
            print("有按钮")
            driver.find_element_by_xpath('//*[@id="app"]/article/div[3]/div[2]/div[2]/div[1]/div[1]/div[1]/div[5]').click()
            print("Clicked")
        else:
            print("等10s")
            time.sleep(10)



driver.get("https://www.bilibili.com/blackboard/xianxing2020bnj.html?anchor=game")
#driver.implicitly_wait(130)

for i in range(40):
    time.sleep(1)
    print(40-i)

while True:
    try:
        bilibili_yeah()
    except:
        print("QAQ出问题等5s")
        time.sleep(5)

Nice!