python selenium爬取鬥魚

歡迎來我的博客:http://dwlufvexyu.com

不加延遲報錯selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":".//span[@class="DyListCover-hot"]"}
(Session info: chrome=80.0.3987.122)

最開始以爲是版本問題，不過應該不會，我檢查了下版本

然後我註釋掉這一段

然後報Message: stale element reference: element is not attached to the page document

但是卻爬取到一段消息

說明有可能是延時的問題，在開頭加上延時，成功解決

附上源碼 import json import time

from selenium import webdriver

driver=webdriver.Chrome()

driver.get("https://www.douyu.com/directory/all")
****# driver.close()****
#

def douyu():
    ##要加延遲，不然要報錯
    time.sleep(5)
    li_list=driver.find_elements_by_xpath('//*[@id="listAll"]/section[2]/div[2]/ul/li')
    # print(list_all)

    content_dict={}
    for li in li_list:
        content_dict["title"]=li.find_element_by_xpath(".//h3").text
        content_dict["belong"]=li.find_element_by_xpath('.//span[@class="DyListCover-zone"]').text
        content_dict["watch_num"]=li.find_element_by_xpath('.//span[@class="DyListCover-hot"]').text
        content_dict["author"] = li.find_element_by_xpath(".//h2").text
        print(content_dict)
        #將字典轉換爲字符串便於存儲
        s=json.dumps(content_dict,ensure_ascii=False)  #json序列化默認對中文采用ascii編碼，所以False
        with open("douyu.txt","a",encoding="utf-8") as f:
            f.write(s+'\n')
    next_url=driver.find_elements_by_xpath('//li[@title="下一頁"]/span[@class="dy-Pagination-item-custom"]')
    #三元表達式
    next_url=next_url[0] if len(next_url) > 0 else None
    while next_url is not None:
        next_url.click()
        time.sleep(3)
        #我調我自己 點擊下一頁停5s繼續爬取 延時設在開頭
        douyu()

douyu()