09爬虫-selenium实例

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

class Douyu(object):
    def __init__(self):
    	#设置url	
        self.url="https://www.douyu.com/directory/all"
        #创建浏览器driver对象
        self.driver=webdriver.Chrome()

    def parse_data(self):
    	#睡眠三秒后再获取元素列表，否则元素还没加载出来就获取了会报错
        time.sleep(3)
        room_list=self.driver.find_elements(By.XPATH,'//*[@id="listAll"]/section[2]/div[2]/ul/li/div')
        print(len(room_list))
        data_list=[]
        #循环遍历元素列表，从每个元素中取出需要的数据进行保存
        for room in room_list:
            temp = {}
            temp['title']=room.find_element(By.XPATH,'./a/div[2]/div[1]/h3').text
            temp['type']=room.find_element(By.XPATH,'./a/div[2]/div[1]/span').text
            temp['owner']=room.find_element(By.XPATH,'./a[1]/div[2]/div[2]/h2').text
            temp['num']=room.find_element(By.XPATH,'./a[1]/div[2]/div[2]/span').text
       
            data_list.append(temp)
        return data_list
        
	#循环打印出列表中的每个词典
    def save_data(self, data_list):
        for data in data_list:
            print(data)

    def run(self):
        self.driver.get(self.url)
        while True:
            # parse
            data_list = self.parse_data()
            # save
            self.save_data(data_list)
            # next
            try:
            	#执行js语法，让滚轮往下滑动
                self.driver.execute_script('scrollTo(0,1000000)')
                #找下一页的元素，并点击
                el_next = self.driver.find_element(By.XPATH,'//*[contains(text(),"下一页")]')
                el_next.click()
            except:
                break

if __name__ == '__main__':
    dy=Douyu()
    dy.run()