import urllib.request
values = {"username":"xxx","password":"xxx"}
data = urllib.parse.urlencode(values).encode(encoding='UTF8')
url = "https://passport.youkuaiyun.com/account/login?from=http://my.youkuaiyun.com/my/mycsdn"
request = urllib.request.Request(url,data)
response = urllib.request.urlopen(request)
foo = open("foo.txt","wb")
foo.write(response.read())
#print(response.read())