code is shown in the figure:

-sharp -*- coding:utf-8 -*-
import webbrowser
import pyperclip
import sys
import bs4
import requests

search_target = pyperclip.copy("kkkk")
if len(sys.argv) > 1:
     search_target = " ".join(sys.argv[1:])
else:
    search_target = pyperclip.paste()

res_temp = "http://www.baidu.com/s?wd=" + search_target
webbrowser.open(res_temp)

res = requests.get(res_temp)
bsObj = bs4.BeautifulSoup(res.text, "html.parser")
print(bsObj)
-sharph3 = bsObj.findAll("h3", {"class":"t"}) 
-sharpprint(h3)



print("---1---")
div = bsObj.findAll("div", {"class":"result c-container "}) 
print(div)
print("---2---")
h3 = div.findAll("h3",{"class":"t"})
print(h3)
print("---3---")

the running result is as follows:

:

divh3
:

H3 is already a sub-tag under the div tag, so why can it be collected by div but not by H3?