What If tool returning error

[guruvittal]

What If tool returning error

[jameswex]

Thanks for the bug report. The What-If Tool isn't in active development, so regressions like this aren't too surprising if our demos don't have perfectly-locked version numbers of all downstream dependencies. I'm guessing what is happening here is that a new version of some package used by the tensorflow estimator code for this model has changed the format with which the predictions are returned, leading to the tool's front-end being given a list instead of a raw prediction value (float) for each datapoint.

One simple solution for this would be to update this demo to move away from use of tensorflow estimator and towards a different model api that could have a simple WIT custom prediction function written to wrap it.