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)
最開始以為是版本問題，不過應該不會，我檢查了下版本
然后我注釋掉這一段
然后報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，ok
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["hot"]=li.find_element_by_xpath('.//span[@class="DyListCover-hot"]').text
content_dict["author"] = li.find_element_by_xpath(".//h2").text
print(content_dict)
#將字典轉換為字符串便于存儲
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()
