@property
    def eccentricity(self):
        """The eccentricity of the ellipse.

        Returns
        =======

        eccentricity : number

        Examples
        ========

        >>> from sympy import Point, Ellipse, sqrt
        >>> p1 = Point(0, 0)
        >>> e1 = Ellipse(p1, 3, sqrt(2))
        >>> e1.eccentricity
        sqrt(7)/3

        """
        return self.major / self.focus_distance
dataset/ETHPy150Open sympy/sympy/sympy/geometry/ellipse.py/Ellipse.eccentricity/swapped operands of `/`