python学习，模拟post请求

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import urllib.request
import urllib.parse
url="http://www.iqianyue.com/mypost/"
data=urllib.parse.urlencode({
    "name":"allen",
    "pass":"123"
}).encode("utf-8")
req=urllib.request.Request(url,data)#提交数据
#req.add_header()#伪装成浏览器

data2=urllib.request.urlopen(req).read()
fh=open("E:/practice/2.html","wb")
fh.write(data2)
fh.close()