Flask equivalents exist in every language. Tensorflow bindings are available in many. Pandas is more specific to Python, but using dataframes in Python vs R vs Julia each has a different feel.
But if you're talking about Racket, I would want to know what you can do with it. Does it have a data science library? A web app framework?
Libraries make Python better than Lisp for machine learning. Language features make Haskell better than Python for formal verification.