Github user zjffdu commented on the issue:
https://github.com/apache/zeppelin/pull/1677
Yes, and you also need to update method `__getitem__` so that user don't
need to construct DataFrame as this. `z.get("myScalaDataFrame")` should return
DataFrame directly
```
myScalaDataFrame = DataFrame(z.get("myScalaDataFrame"), sqlContext)
```
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