python 获取网页特定图片并保存至本地

一般步骤

1.查看网页地址，F2查看要获取的图片url

2.根据要获取的url图片地址，写出合适的正则表达式

例：获取页面中如下区域图片：https://blog.csdn.net/julielele?spm=3001.5343

 F12查看图片链接

 获得正则表达式：

format = r'src="https://www.mshxw.com/skin/sinaskin/image/nopic.gif" alt'

代码示例

import os
import re,urllib.request
import time

def getImage(format,url,filePath):
    '''
    :param format: 匹配的正则表达式
    :param url: 获取图片的网址
    :param filePath: 获取的图片存入的文件夹
    :return:
    '''
    request = urllib.request.urlopen(url)
    buf = request.read().decode('utf-8')
    # 获取符合条件的图片链接
    listurl = re.findall(format,buf)
    print(listurl)
    #筛选拼接图片链接
    res=[]
    for url in listurl:
         res.append(url+".png")
    timestr = time.strftime("%Y-%m-%d-%H-%M-%S",time.localtime())
    path = filePath+"img"+timestr+"\"
    isExists=os.path.exists(path)
    if not isExists: os.makedirs(path)
    index = 0
    for url in res:
        print(url)
        try:
            f = open(path+str(index)+'.png', 'wb')
            request = urllib.request.urlopen(url)
            buf = request.read()
            f.write(buf)
            index = index + 1
        except Exception:
            continue
        finally:
            #关闭文件
            f.close()

url = "https://blog.csdn.net/julielele?spm=3001.5343"
#匹配截取开头的url('结尾的.png后的数据
# format = r'url('(.*).png'
format = r'src="https://www.mshxw.com/skin/sinaskin/image/nopic.gif" alt'
filePath = "d:img"
getImage(format,url,filePath)

运行后结果：