Python3.x 文件写入出现错误 TypeError: write() argument must be str, not bytes

背景

    用Pycharm编辑器Python3.x语言写一个百度贴吧爬虫程序

代码如下：

import urllib.request
import urllib.parse
def loadPage(url):
    headers = {"User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36 LBBROWSER "}
   #构造一个请求对象
    request = urllib.request.Request(url,headers=headers)
    response = urllib.request.urlopen(request)
   # print(response.read())
    return response.read()
def writePage(html,filename):
    """
    作用:将html内容写入到本地
    html：服务器相应文件内容
    """
    #文件写入
    with open(filename,"w") as f :
        f.write(html)
    print("_"*30)
def tiebaSpider(url,beginPage,endPage):
   """
   作用：贴吧爬虫调度器，负责组合处理每个页面的url
   url:贴吧url的前部分
   beginPage ：起始页
   endPage ： 结束页
   """
   for page in range (beginPage,endPage+1):
       pn = (page - 1)*50
       filename = "第" + str(page) + "页.html"
       html = url +"&pn" +str(pn)
       #print(html)
       html =loadPage(html)
       writePage(html,filename)
       #print(html.decode("utf-8"))
if __name__ == "__main__" :
    kw = input("请输入需要爬取的贴吧名：")
    beginPage = int(input("请输入起始页："))
    endPage = int(input("请输入结束页："))
    url = "http://tieba.baidu.com/f?"
    key = urllib.parse.urlencode({"kw":kw})
    fullurl = url +key
    tiebaSpider(fullurl,beginPage,endPage)

程序运行：

在网上查资料可知，pickle存储方式默认是二进制方式，将writePage方法中代码with open(filename,"w") as f :改成二进制方式打开便可，with open(filename,"wb") as f :

运行结果如下：