Python爬虫实战(十一)：两种简单的方法爬取动态网页

╰半橙微兮° 2022-06-06 11:26 309阅读 0赞

#一网页POST方式
    
    #coding=utf-8  
      
    import requests
    from bs4 import Tag
    from bs4 import BeautifulSoup
    from prettytable import PrettyTable  
      
    def getHtml(url,pageNo):  
         data = {#反复分析得出只需要提交这两个参数即可
            'page.pageNo':pageNo,   #页码 
            'tempPageSize':10,      #每页显示条数
            }  
         headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0'}     #伪装一下
         page = requests.post(url,headers = headers,data = data)    #POST方式提交
         html = page.text  
         return html
    
    def getData(html):
        global row
        get_text = Tag.get_text
        
        soup = BeautifulSoup(html, 'html.parser')
        for i in range(1,11):
             info = []
             texts = soup.find_all('td',rowid = str(i)) #分析查找的数据得出该方法
             for text in texts:
                  info.append(text.get_text())
             row.add_row (info)
                
      
      
      
      
    if __name__=='__main__':  
        url = 'http://datacenter.mep.gov.cn:8099/ths-report/report!list.action?xmlname=1465594312346'
        row = PrettyTable()
        row.field_names = ['序号',"所属省份", "所属市（区、地、州）", "养殖场（小区）名称", "畜禽种类","数量（头羽）","COD排放量（mg/h）","NH3排放量（mg/h）","年份"] 
        for i in range(1,5):  #只爬取5页的数据
            html = getHtml(url,i)
            getData(html)
        print (row)

方式二：selenium爬取方式