區分開頭像和圖片所在資料夾就好

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from urllib.request import Request,urlopen ,urlretrieve
from bs4 import BeautifulSoup
import re
import os
H = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36'}
url = "http://www.qiushibaike.com/imgrank/page/5/?s=4922922"
req = Request(url=url,headers=H)
html = urlopen(req)
src = BeautifulSoup(html,"html.parser")
a = src.findAll("img",{"src":re.compile("http:\/\/pic\.qiushibaike\.com\/system\/pictures.*\.jpg")})

#建立資料夾
dir = os.getcwd()+"\\pic"  
if not os.path.exists(dir):
    os.makedirs(dir)

x = 1
for i in a:
    path = i["src"]
    urlretrieve(path,dir+'\\%s.jpg'%x)#下載
    x+=1