huaxingao commented on a change in pull request #26035:
[SPARK-29360][PYTHON][ML] PySpark FPGrowthModel supports getter/setter
URL: https://github.com/apache/spark/pull/26035#discussion_r331798860
##########
File path: python/pyspark/ml/fpm.py
##########
@@ -197,20 +171,22 @@ class FPGrowth(JavaEstimator, HasItemsCol,
HasPredictionCol,
| [r]| 3|
+---------+----+
only showing top 5 rows
+ ...
>>> fpm.associationRules.show(5)
- +----------+----------+----------+
- |antecedent|consequent|confidence|
- +----------+----------+----------+
- | [t, s]| [y]| 1.0|
- | [t, s]| [x]| 1.0|
- | [t, s]| [z]| 1.0|
- | [p]| [r]| 1.0|
- | [p]| [z]| 1.0|
- +----------+----------+----------+
+ +----------+----------+----------+----+
+ |antecedent|consequent|confidence|lift|
+ +----------+----------+----------+----+
+ | [t, s]| [y]| 1.0| 2.0|
+ | [t, s]| [x]| 1.0| 1.5|
+ | [t, s]| [z]| 1.0| 1.2|
+ | [p]| [r]| 1.0| 2.0|
+ | [p]| [z]| 1.0| 1.2|
+ +----------+----------+----------+----+
only showing top 5 rows
+ ...
>>> new_data = spark.createDataFrame([(["t", "s"], )], ["items"])
- >>> sorted(fpm.transform(new_data).first().prediction)
- ['x', 'y', 'z']
+ >>> sorted(fpm.transform(new_data).first().newPrediction)
+ [u'x', u'y', u'z']
Review comment:
Because I added ```fpm.setPredictionCol("newPrediction")``` to test the
newly added ```setPredictionCol``` on ```FPGrowthModel```, now the
predictionCol is ```newPrediction``` instead of ```prediction```.
The [u'string'] change is not because of the predictionCol sets to
```newPrediction```. It is to fix the existing problem. Seems the doctests have
never run before, so the problem was never caught.
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