'utf-8'报错的问题 不知道错在哪

Question

产生这样的报错'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte我代码：from urllib import requesturl = "http://odds.500.com/fenxi/yazhi-749525.shtml"headers = {"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0"}req = request.Request(url)resp = request.urlopen(req)a = resp.read()print(a.decode('utf-8'))### 问题描述