Github user Tagar commented on the issue:
https://github.com/apache/zeppelin/pull/2502
My two cents
> One of the things I learned about Jupyter's implementation is that it
never intercepts an error case
I personally not necessarily like how this piece is implemented in
Jupyter.. that an error can be silently ignored, and in case of an error whole
{.. } block is returned unchanged.
Should we have a Zeppelin option that controls this behavior?
1. Option 1 if used - it'll completely follow Jupyter bahavior (no error,
{..} block return unchanged).
2. Option 2 - fail explicitly if variable in curly braces can't be found.
That being said, I think most of folks may actually prefer option 1, as
introduction of { .. } may be a breaking change for some notebooks' code. So I
think Option 1 should be default.
> This follows a suggestion from @Leemoonsoo earlier in the PR. My
implementation of this feature for the Shell interpreter is also ready, and I
will submit a PR once this one is done.
That's great. Thanks for working on this. I see there are so many good use
cases for this feature.
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