Github user zjffdu commented on the issue:
https://github.com/apache/zeppelin/pull/2207
I think a more thorough solution is to separate the namespace between
python process and python repl. Only `ZeppelinContext` should be `available` in
python repl namespace. It would be better to specify a space in `exec`.
e.g.
```
exec(code, global=repl_namespace)
```
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