NumExpr defaulting to 8 threads

This particualr line in the code

`res = learn.predict(k)`
leads to this : NumExpr defaulting to 8 threads

and the result isn't properly displayed,so had to use regex and work around to get the toxicity score

Would appreciate if anyone can fix this or has a better work around

Start by reproducing the issue at `res = learn.predict(k)` and inspect the NumExpr warning and resulting output. Done means the toxicity score is displayed correctly without requiring a regex workaround.

Written by the indexing model from the issue text.