Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/8643#discussion_r43720929
--- Diff: python/pyspark/mllib/clustering.py ---
@@ -690,6 +690,21 @@ class LDAModel(JavaModelWrapper):
>>> model = LDA.train(rdd, k=2)
>>> model.vocabSize()
2
+ >>> topics = model.describeTopics()
+ >>> len(topics)
+ 2
+ >>> len(list(topics[0])[0])
+ 2
+ >>> len(list(topics[0])[1])
+ 2
+ >>> topics = model.describeTopics(1)
--- End diff --
One test case should be enough.
These test will become example in docs, so it's better to be more readable,
for example:
```
>>> list(sorted(model.describeTopics()))
[([0, 1], [0.50..., 0.49...]), ([1, 0], [0.50..., 0.49...])]
```
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