Python网络爬虫及应用实例

编程实现下述功能。

文件ngchina.html保持了网页源代码，请将该页面中图片的URL提取出来,并输出所有图像的URL。

ngchina.html下载

file = open("ngchina.html","r",encoding = \'utf-8\')
html_lines = file.readlines()
file.close()
url_list = []
for line in html_lines:
    if \'img\' in line:
        url = line.split(\'src=\')[-1].split(\'"\')[1]
        if \'http\' in url:
            url_list.append(url)
count = 1
for url in url_list:
    print("url-{:2}：{}".format(count,url))
    count += 1