Python3.6请求网站时报错：http.client.RemoteDisconnected: Remote end closed connection without response

调整前的代码段：

    data = urllib.request.urlopen(url).read()

运行时报错：

    http.client.RemoteDisconnected: Remote end closed connection without response

调整后代码段：

headers = {'User-Agent': 'User-Agent:Mozilla/5.0'}    data1 = urllib.request.Request(url, headers=headers)    data = urllib.request.urlopen(data1).read()

正常运行

原因：服务器限制了部分User-Agent的访问。