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 th ...

About Could not find solution to round a number up purely arithmetically, w/o if statements, relational operators and built-in functions so I tried to make one.

This quick tutorial shows users how to round in Python using one of three methods. You'll also discover how to do more with the math module.