Python学习-爬虫学习之 HTTP Error 403: Forbidden

对于开始抓取一个网站的信息，有的网站会防止此类爬虫抓取，所以会出现如下错误：

这是问题代码:
 

from urllib import request

class Count():
    url = 'https://www.douyu.com/g_LOL'
    # headers = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0'}  
    
    def __fetch_content(self):
        # req = request.Request(url=Count.url, headers=Count.headers)  
        r = request.urlopen(Count.url) 
        htmls = r.read()
      
    def go(self):
        self.__fetch_content()

spider = Count()
spider.go()

处理过后的代码（网上找的）Python3 ：

from urllib import request

class Count():
    url = 'https://www.douyu.com/g_LOL'
    headers = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0'}  
    
    def __fetch_content(self):
        req = request.Request(url=Count.url, headers=Count.headers)  
        r = request.urlopen(req) 
        htmls = r.read()
      
    def go(self):
        self.__fetch_content()

spider = Count()
spider.go()