這個我是拿來參考的 

import requests

def url_open(url):
    response = requests.get(url)
    html = response.content
    return html


url="http://jandan.net/ooxx/"

html=url_open(url).decode("utf-8")
image_urllist=[]
a=html.find("img src=")
while a!=-1:
    b=html.find("jpg",a,a+255)
    if b!=-1:
        image_urllist.append(
 
"http:"+html[a+9:b+4])
    else:
        b=a+9
    a=html.find("img src=",b)

count=0
for index,each in enumerate(image_urllist):
    # filename=each.split("/")[-1]
    filename=str(count)+".jpg"
    with open(filename,"wb") as f:
        img=url_open(each)
        f.write(img)
        print(each)
    
 
if index>3:
        break
    count+=1