How to move the train model to production?

问题

I have finalized a model and it is performing within acceptable limits. I am using python and scitkit-learn specifically.

Next is to move the model to production.

May I request help to move these models to production. How can I save a trained model in such a way that I can move it to production.

Thanks in advance for help.

回答1:

As the commentor suggested, you should use pickle. Specifically for ML, what you're looking for is Model persistence. And with scikit-learn:

After training a scikit-learn model, it is desirable to have a way to persist the model for future use without having to retrain.

And their example:

>>> from sklearn import svm
>>> from sklearn import datasets
>>> clf = svm.SVC()
>>> iris = datasets.load_iris()
>>> X, y = iris.data, iris.target
>>> clf.fit(X, y)  
SVC(C=1.0, cache_size=200, class_weight=None, coef0=0.0,
    decision_function_shape='ovr', degree=3, gamma='auto', kernel='rbf',
    max_iter=-1, probability=False, random_state=None, shrinking=True,
    tol=0.001, verbose=False)

>>> import pickle
>>> s = pickle.dumps(clf)
>>> clf2 = pickle.loads(s)
>>> clf2.predict(X[0:1])
array([0])
>>> y[0]
0

In the specific case of the scikit, it may be more interesting to use joblib’s replacement of pickle (joblib.dump & joblib.load), which is more efficient on objects that carry large numpy arrays internally as is often the case for fitted scikit-learn estimators, but can only pickle to the disk and not to a string:

>>> from sklearn.externals import joblib
>>> joblib.dump(clf, 'filename.pkl') 

来源：https://stackoverflow.com/questions/46735954/how-to-move-the-train-model-to-production