[已解决]0基础学python060讲求助正则下载图片问题

冰封雪舞

import urllib.request
import re
def open_url(url):
    req = urllib.request.Request(url)
    req.add_header('User-Agent','Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36')
    page=urllib.request.urlopen(req)
    html=page.read().decode('utf-8')
    return html
def get_img(html):
    p = r'<img class="BDE_Image" src = "([^"]+\.jpg"'
    imglist = re.findall(p,html)
    for each in imglist:
        print(each)


if __name__=='__main__':
    url = 'http://tieba.baidu.com/p/3563409202'
    get_img(open_url(url))

按照老师说的打的代码但是出现错误，错误如下：不知道错误出在哪里？希望大神指点迷津。
======================== RESTART: D:/Python34/下载图片.py ========================
Traceback (most recent call last):
  File "D:/Python34/下载图片.py", line 18, in <module>
    get_img(open_url(url))
  File "D:/Python34/下载图片.py", line 11, in get_img
    imglist = re.findall(p,html)
  File "D:\Python34\lib\re.py", line 210, in findall
    return _compile(pattern, flags).findall(string)
  File "D:\Python34\lib\re.py", line 294, in _compile
    p = sre_compile.compile(pattern, flags)
  File "D:\Python34\lib\sre_compile.py", line 568, in compile
    p = sre_parse.parse(p, flags)
  File "D:\Python34\lib\sre_parse.py", line 780, in parse
    p = _parse_sub(source, pattern, 0)
  File "D:\Python34\lib\sre_parse.py", line 377, in _parse_sub
    itemsappend(_parse(source, state))
  File "D:\Python34\lib\sre_parse.py", line 730, in _parse
    raise error("unbalanced parenthesis")
sre_constants.error: unbalanced parenthesis
>>>

最佳答案

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°蓝鲤歌蓝

2018-1-23 20:39:42

p = r'<img class="BDE_Image" src = "([^"]+\.jpg"' 少了个右括号。

跳转到最佳答案楼层

ド゛゜范

p = r'<img class="BDE_Image" src = "([^"]+\.jpg"'

°蓝鲤歌蓝

p = r'<img class="BDE_Image" src = "([^"]+\.jpg"' 少了个右括号。