import requests,os
from bs4 import BeautifulSoup
from urllib.request import urlopen

#指定要抓的網址  http://www.ntcu.edu.tw/newweb/index.htm
url = 'xxx'

html = requests.get(url)
html.encoding="utf-8"

sp = BeautifulSoup(html.text, 'html.parser')

# 建立 images 目錄儲存圖片

# ex. images_dir="images/"   images為指定的目錄
images_dir="XXX"


if not os.path.exists(images_dir):
    os.mkdir(images_dir)
    
# 取得所有 <a> 和 <img> 標籤
all_links=sp.find_all(['a','img']) 
for link in all_links:
    # 讀取 src 和　href 屬性內容
    src=link.get('src')
    href = link.get('href')
    attrs=[src,src]
    for attr in attrs:
        # 讀取　.jpg 和　.png 檔
        if attr != None and ('.jpg' in attr or '.png' in attr):
            # 設定圖檔完整路徑
            full_path = attr            
            filename = full_path.split('/')[-1]  # 取得圖檔名
            ext = filename.split('.')[-1]  #取得副檔名
            filename = filename.split('.')[-2] #取得主檔名
            if 'jpg' in ext: filename = filename + '.jpg'
            else:            filename = filename + '.png'
            print(attr)
            # 儲存圖片
            try:
                image = urlopen(full_path)
                f = open(os.path.join(images_dir,filename),'wb')
                f.write(image.read())
                f.close()
            except:
                print("{} 無法讀取!".format(filename))