思路：用迴圈爬取n（任意數字）頁程式碼，然後儲存在檔案裡
一共三個函式：

• get_html函式是用來爬取頁面
• save_html函式用來把爬取來的頁面程式碼儲存在檔案中
• main作為主函式
  程式碼如下：

from urllib.request import urlopen,Request
from urllib.parse import urlencode

def get_html(url):
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36"
 

    }
    request = Request(url, headers=headers)
    response = urlopen(request)
    info = response.read()
    print(info.decode())
    return info
def save_html(filename,html_bytes):
    with open(filename,"wb") as f:
        f.write(html_bytes)

def main():
    content=input("要下載的內容:")
    num=
 
input('下載的頁數:')
    base_url="http://tieba.baidu.com/f?ie=utf-8{}"
    for pn in range(int(num)):
        args={
            "pn":pn*50,
            "kw":content
        }
        filename="第"+str(pn+1)+"頁.html"
        url=base_url.format(urlencode(args))
        print("正在下載"+filename)
        html_bytes=
 
get_html(url)
        save_html(filename,html_bytes)

if __name__ == '__main__':
    main()