def _print_yn(self, expr):
        from sympy.functions import sqrt, bessely
        x = expr.argument
        expr2 = sqrt((2*x)/S.Pi)*bessely(expr.order + S.Half, x)
        return self._print(expr2)
dataset/ETHPy150Open sympy/sympy/sympy/printing/octave.py/OctaveCodePrinter._print_yn/swapped operands of `/`