(self, parameter='t')
return [t, 0, 1]
The plot interval for the default geometric plot of the Segment gives
        values that will produce the full segment in a plot.

        Parameters
        ==========

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

        Returns
        =======

        plot_interval : list
            [parameter, lower_bound, upper_bound]

        Examples
        ========

        >>> from sympy import Point, Segment
        >>> p1, p2 = Point(0, 0), Point(5, 3)
        >>> s1 = Segment(p1, p2)
        >>> s1.plot_interval()
        [t, 0, 1]
The plot interval for the default geometric plot of the Segment gives
        values that will produce the full segment in a plot.
The plot interval for the default geometric plot of the Segment gives values that will produce the full segment in a plot .
def plot_interval(self, parameter='t'):
        """The plot interval for the default geometric plot of the Segment gives
        values that will produce the full segment in a plot.

        Parameters
        ==========

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

        Returns
        =======

        plot_interval : list
            [parameter, lower_bound, upper_bound]

        Examples
        ========

        >>> from sympy import Point, Segment
        >>> p1, p2 = Point(0, 0), Point(5, 3)
        >>> s1 = Segment(p1, p2)
        >>> s1.plot_interval()
        [t, 0, 1]

        """
        t = _symbol(parameter)
        return [t, 0, 1]
def plot_interval ( self , parameter = 't' ) : t = _symbol ( parameter ) return [ t , 0 , 1 ]