Make sure you use the same strings (e.g. "Arctan") across numpy and polars parsers.

[light-weaver]

math_json_parser/math_json_parser/parser_numexpr.py

Line 33 in 4f40955

"Arctan2":"arctan2", #math.atan2(x,y)

The frontend will not be aware of the choice between numpy/polars in the backend.

[timbrist]

Thanks for the code review, I will solve this issues ASAP.