1.下載圖片的兩種方法：
1). urllib.request.urlretrieve 方法：方法簡(jiǎn)單，直接對(duì)獲取到的圖片鏈接進(jìn)行下載。
urlretrieve(url,path)

2). requests寫入方法：對(duì)圖片鏈接進(jìn)行請(qǐng)求，文件寫入時(shí)采用‘wb’方式，寫入數(shù)據(jù)為r.content。

r = requests.get(url)
with open(filename, 'wb') as f:     
    f.write(r.content)

2.實(shí)例：百度貼吧圖片，共67張圖片。

#方法一
import re
import urllib.request

url = "http://tieba.baidu.com/p/2460150866"
response = urllib.request.urlopen(url).read().decode('UTF-8')
##response = urllib.request.urlopen(url).read().decode()        #等價(jià)于上一句，默認(rèn)用UTF-8來解碼

imglist = re.findall('src="(.+?\.jpg)" pic_ext',response)

x = 0
for imgurl in imglist:
    urllib.request.urlretrieve(imgurl,"F:/{}.jpg".format(x))    #遠(yuǎn)程下載圖片
    x +=1
    print("第",x,"張")
print("Finshed!")

#方法二
import re
import requests

url = "http://tieba.baidu.com/p/2460150866"
r = requests.get(url)

imglist = re.findall('src="(.+?\.jpg)" pic_ext',r.text)

x = 0
for imgurl in imglist:
    imgres = requests.get(imgurl)
    with open("F:/{}.jpg".format(x),"wb") as f:                 ##保存圖片
        f.write(imgres.content)
        x +=1
        print("第",x,"張") 
print("Finshed!")