Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/10469#discussion_r49408892
--- Diff: python/pyspark/ml/regression.py ---
@@ -68,6 +69,28 @@ class LinearRegression(JavaEstimator, HasFeaturesCol,
HasLabelCol, HasPrediction
Traceback (most recent call last):
...
TypeError: Method setParams forces keyword arguments.
+ >>> import os, tempfile
+ >>> path = tempfile.mkdtemp()
+ >>> lr_path = path + "/lr"
+ >>> lr.save(lr_path)
+ >>> lr2 = LinearRegression.load(lr_path)
+ >>> model2 = lr2.fit(df)
+ >>> abs(model.coefficients[0] - model2.coefficients[0]) < 0.001
+ True
+ >>> abs(model.intercept - model2.intercept) < 0.001
+ True
+ >>> model_path = path + "/model"
+ >>> model.save(model_path)
+ >>> model3 = LinearRegressionModel.load(model_path)
+ >>> abs(model.coefficients[0] - model3.coefficients[0]) < 0.001
--- End diff --
Test for exact equality here & in the next line
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