First, you can use the built-in round() function. This will round values either up or down. math.floor(), meanwhile, will round the value down. Finally, math.ceil() will round the value up to the ...

It appears that rather than a native SymPy round() function, SymPy overloads the native Python round() function so that it accepts and returns Sympy number types. In the 1.9 documentation I find this: ...