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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def graph_lasso(X, num_folds):
 """Estimate inverse covariance via scikit-learn GraphLassoCV class. """

    print("GraphLasso (sklearn)")
    model = GraphLassoCV(cv=num_folds)
    model.fit(X)
    print("   lam_: {}".format(model.alpha_))
    return model.covariance_, model.precision_, model.alpha_