(self, parameter='t')
return [t, 0, 10]
The plot interval for the default geometric plot of the Ray. Gives
        values that will produce a ray that is 10 units long (where a unit is
        the distance between the two points that define the ray).

        Parameters
        ==========

        parameter : str, optional
            Default value is 't'.

        Returns
        =======

        plot_interval : list
            [parameter, lower_bound, upper_bound]

        Examples
        ========

        >>> from sympy import Point, Ray, pi
        >>> r = Ray((0, 0), angle=pi/4)
        >>> r.plot_interval()
        [t, 0, 10]
The plot interval for the default geometric plot of the Ray. Gives
        values that will produce a ray that is 10 units long (where a unit is
        the distance between the two points that define the ray).
The plot interval for the default geometric plot of the Ray . Gives values that will produce a ray that is 10 units long ( where a unit is the distance between the two points that define the ray ) .
def plot_interval(self, parameter='t'):
        """The plot interval for the default geometric plot of the Ray. Gives
        values that will produce a ray that is 10 units long (where a unit is
        the distance between the two points that define the ray).

        Parameters
        ==========

        parameter : str, optional
            Default value is 't'.

        Returns
        =======

        plot_interval : list
            [parameter, lower_bound, upper_bound]

        Examples
        ========

        >>> from sympy import Point, Ray, pi
        >>> r = Ray((0, 0), angle=pi/4)
        >>> r.plot_interval()
        [t, 0, 10]

        """
        t = _symbol(parameter)
        return [t, 0, 10]
def plot_interval ( self , parameter = 't' ) : t = _symbol ( parameter ) return [ t , 0 , 10 ]