python中urllib用法

import urllib.request# 发送 GET 请求response = urllib.request.urlopen("http://example.com")print(response.read())# 发送 POST 请求data = {"username": "user", "password": "pass"}data_encoded = urllib.parse.urlencode(data).encode("utf-8")request = urllib.request.Request("http://example.com/login", data=data_encoded)response = urllib.request.urlopen(request)print(response.read())