(self)
The y direction of the ray.

        Positive infinity if the ray points in the positive y direction,
        negative infinity if the ray points in the negative y direction,
        or 0 if the ray is horizontal.

        See Also
        ========

        xdirection

        Examples
        ========

        >>> from sympy import Point, Ray
        >>> p1, p2, p3 = Point(0, 0), Point(-1, -1), Point(-1, 0)
        >>> r1, r2 = Ray(p1, p2), Ray(p1, p3)
        >>> r1.ydirection
        -oo
        >>> r2.ydirection
        0
The y direction of the ray.
The y direction of the ray .
def ydirection(self):
        """The y direction of the ray.

        Positive infinity if the ray points in the positive y direction,
        negative infinity if the ray points in the negative y direction,
        or 0 if the ray is horizontal.

        See Also
        ========

        xdirection

        Examples
        ========

        >>> from sympy import Point, Ray
        >>> p1, p2, p3 = Point(0, 0), Point(-1, -1), Point(-1, 0)
        >>> r1, r2 = Ray(p1, p2), Ray(p1, p3)
        >>> r1.ydirection
        -oo
        >>> r2.ydirection
        0

        """
        if self.p1.y < self.p2.y:
            return S.Infinity
        elif self.p1.y == self.p2.y:
            return S.Zero
        else:
            return S.NegativeInfinity
def ydirection ( self ) : if self . p1 . y < self . p2 . y : return S . Infinity elif self . p1 . y == self . p2 . y : return S . Zero else : return S . NegativeInfinity