Selenium

自动化测试工具，支持多种浏览器；
爬虫中主要用来解决JavaScript渲染问题。

用法详解

基本使用

声明浏览器对象

from selenium import webdriver

browser = webdriver.Chrome()
browser = webdriver.Firefox()
browser = webdriver.Edge()
browser = webdriver.PhantomJS()
browser = webdriver.Safari()

访问页面

browser = webdriver.Chrome()
browser.get('https://www.taobao.com')
print(browser.page_source)
browser.close()

查找元素

单个元素

from selenium import webdriver

browser = webdriver.Chrome()
browser.get('https://www.taobao.com')
input_first = browser.find_element_by_id('q')
input_second = browser.find_element_by_css_selector('#q')
input_third = browser.find_element_by_xpath('//*[@id="q"]')
print(input_first, input_second, input_third)#这些方法效果是同样的
browser.close()

一样的方法

from selenium import webdriver
from selenium.webdriver.common.by import By

browser = webdriver.Chrome()
browser.get('https://www.taobao.com')
input_first = browser.find_element(By.ID,'q')
print(input_first)
browser.close()

多个元素

from selenium import webdriver

browser = webdriver.Chrome()
browser.get('https://www.taobao.com')
lis = browser.find_elements_by_css_selector('.service-bd Ii')
print(lis)
browser.close()

from selenium import webdriver
from selenium.webdriver.common.by import By

browser = webdriver.Chrome()
browser.get('https://www.taobao.com')
lis = browser.find_elements(By.CSS_SELECTOR,'.service-bd li')
print(lis)
browser.close()

元素交互操作

对获取的元素调用交互方法

交互动作

将动作附加到动作链中串行执行

执行JavaScript

获取元素信息

Frame

等待

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标签：yinyue,www,渲染,ximalaya,JavaScript,爬虫,https,com,browser
来源： https://www.cnblogs.com/strugksjncxa/p/11256255.html