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Python爬虫图片抓不到？动态加载的锅，selenium直接掀翻

2026-08-02 分类：服务器百科 阅读(2) 评论(0)

本项目将使用库、库、库实现下载百度图片的功能．

１、前言

首先, 为何要使用库? 因为于我们编写爬虫代码之中, 或许会碰到一个问题, 即我们所需爬取的内容、虽打开浏览器开发者工具能看到对应的HTML代码, 然而打开网页源代码却寻觅不到对应的内容, 并且使用库获取到的HTML代码亦不涵盖那部分内容。致使这种问题之所以出现的缘由在于、你想要爬取的内容采用了js动态加载的方式, 属于动态网页。

所谓动态网页是与静态网页相对的一种网页编程技术, 静态网页随html代码生成后页面内容和显示效果不会变化, 动态网页不同, 其显示页面是处理数据后生成的结果且可改变, 此数据来源多样, 可能是计算生成也可能是Ajax加载的。

从下面两张图中可以看到区别

那么, 依据以上的描述, 我们能够知晓, 使用库的目的在于解决库没办法加载动态网页的问题。那么, 库究竟是什么呢?

２、库

首先, 它原本是一个专门针对Web应用程序的测试工具, 该测试能直接于浏览器内运行, 仿若真实用户在进行操作那般。其能支持的浏览器涵盖了IE（7, 8, 9, 10, 11）, 还有Opera等等。然而, 后续随着动态网页技术的问世, 我们借助传统方式去爬取动态网页遭遇了诸多困难, 就在这个时候, 有人开始将该库应用于动态网页的爬取工作, 虽说速度变得缓慢了, 不过爬取所得到的结果却是相当不错的。

2.1 安装库

pip install selenium

2.2 下载浏览器驱动

由于我最常使用的是浏览器，所以我以浏览器为例．

首先，在地址栏输入地址

chrome://version

可以看到, 图中的, 最上面那一行, 呈现着这样的数字, 77.0.3865.90, 其对应的版本呢, 是77。

然后再从网站找到对应版本的．

2.3 使用

# 从selenium导入webdriver
from selenium import webdriver
from bs4 import BeautifulSoup
import time
ChromeDriverPath = "/home/nc/download/google/chromedriver"
#

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