module 'urllib' has no attribute 'urlopen'报错

今天练习使用Python爬取网站图片，遇到些小问题，求证后，将经验分享下 ：-）

原来的代码：

import urllib
import re

def getHtml(url):
    page = urllib.urlopen(url)
    html = page.read()
    return html

def getImg(html):
    html = html.decode('utf-8')
    reg = r'src="(.+?\.jpg)" pic_ext'
    imgre = re.compile(reg)
    imglist = re.findall(imgre,html)
    x = 0
    for imgurl in imglist:
        urllib.urlretrieve(imgurl,'%s.jpg' % x)
        x+=1
        print('正在打印第%s张图片' % x)
html = getHtml("http://tieba.baidu.com/p/2460150866")
getImg(html)

执行时报错：

Traceback (most recent call last):
File "E:/wenjian/python/python2/wenjianjia/file.py", line 51, in <module>
html = getHtml("http://tieba.baidu.com/p/2460150866")
File "E:/wenjian/python/python2/wenjianjia/file.py", line 37, in getHtml
page = urllib.urlopen(url)
AttributeError: module 'urllib' has no attribute 'urlopen'

Process finished with exit code 1

 

原因是在Python3中不能直接调用import urllib，应改为import urllib.request

 

修改后如下：

import urllib.request
import re
#获取网页源码
def getHtml(url):
    page = urllib.request.urlopen(url)
    html = page.read()
    return html
#使用正则将图片筛选出来
def getImg(html):
    html = html.decode('utf-8')
　　#筛选.jpg格式并以pic_ext结尾的
    reg = r'src="(.+?\.jpg)" pic_ext'  
    imgre = re.compile(reg)
    imglist = re.findall(imgre,html)
    x = 0
    for imgurl in imglist:
        urllib.request.urlretrieve(imgurl,'%s.jpg' % x)
        x+=1
        print('正在打印第%s张图片' % x)
html = getHtml("http://tieba.baidu.com/p/2460150866")
getImg(html)

输出结果如下：