1.下载IronPython，使得能够在.net平台跑python项目，目前只支持python2.7
2.下载MyMediaLite.dll
https://github.com/zenogantner/MyMediaLite

import clr
clr.AddReference("MyMediaLite.dll")
from MyMediaLite import *

load the data

train_data = IO.ItemData.Read("u1.base")
test_data = IO.ItemData.Read("u1.test")

set up the recommender

recommender = ItemRecommendation.UserKNN() # don't forget ()
recommender.K = 20
recommender.Feedback = train_data
recommender.Train()

measure the accuracy on the test data set

print Eval.Items.Evaluate(recommender, test_data, train_data)

make a prediction for a certain user and item

print recommender.Predict(1, 1)