import urllib.request as r
import urllib.parse as p
url='http://www.iqianyue.com/mypost'
#name 和 pass可自信更改
postdata=p.urlencode({
    'name':'cht',
    'pass':'123456'
}).encode('utf-8')
print('postdata参数是:',postdata)

req=r.Request(url,postdata)
req.add_header('User-Agent','Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 SE 2.X MetaSr 1.0')
data=r.urlopen(req).read()
with open('1.html','wb')as f:
    f.write(data)