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      起初学习python写了一个取帖子所有图片的脚本，但是发现获取的图片非高清图片。通过组合高清图的URL加文件名实现抓取高清图，学习过程中记录一下。

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输入贴子ID批量获取贴吧图片脚本

使用方法：
运行后输入帖子的ID即可

例：https://tieba.baidu.com/p/1234567890

输入1234567890

代码：

# -*- coding=utf-8 -*-


import urllib,re,requests
from bs4 import BeautifulSoup

#获取图片URL
def get_page(url):
    html_page = requests.get(url).content
    soup = BeautifulSoup(html_page,'html.parser')
    imgs = soup.find_all('img',class_='BDE_Image')
    return imgs

#获取只看楼主后总页数
def get_number(url):
    html_page = requests.get(url).content
    soup = BeautifulSoup(html_page,'html.parser')
    page_number = soup.find_all('span',class_='red')
    page_no = page_number[1].string
    return page_no

tieba_id = raw_input('Enter tieba ID : ')
tieba_head ='https://tieba.baidu.com/p/'
url_pic_head = 'https://imgsrc.baidu.com/forum/pic/item/'

tieba_str = '?see_lz=1&pn='
tieba_addr = tieba_head + tieba_id + tieba_str
tieba_addr1 = tieba_head + tieba_id + tieba_str
pages_number = int(get_number(tieba_addr1))+1

for x in range(1,pages_number):
    imgurl = tieba_addr+str(x)
    for s in get_page(imgurl):
        src_url = s.get('src')
        file_name = re.findall('([A-Za-z0-9][-A-Za-z0-9]+\.jpg)',src_url)
        jpgs_name = ''.join(file_name)
        pics_url = url_pic_head + jpgs_name   #获取组合http_url头部和文件名后的URL
        try:
            urllib.urlretrieve(pics_url,'C:\\pics\\%s' %jpgs_name)
            print pics_url +'     *Downling Success!*'
        except Exception as e:
            raise e