(self, parameter='t')
return [t] + list(self.limits[1:])
The plot interval for the default geometric plot of the curve.

        Parameters
        ==========

        parameter : str or Symbol, optional
            Default value is 't';
            otherwise the provided symbol is used.

        Returns
        =======

        plot_interval : list (plot interval)
            [parameter, lower_bound, upper_bound]

        See Also
        ========

        limits : Returns limits of the parameter interval

        Examples
        ========

        >>> from sympy import Curve, sin
        >>> from sympy.abc import x, t, s
        >>> Curve((x, sin(x)), (x, 1, 2)).plot_interval()
        [t, 1, 2]
        >>> Curve((x, sin(x)), (x, 1, 2)).plot_interval(s)
        [s, 1, 2]
The plot interval for the default geometric plot of the curve.
The plot interval for the default geometric plot of the curve .
def plot_interval(self, parameter='t'):
        """The plot interval for the default geometric plot of the curve.

        Parameters
        ==========

        parameter : str or Symbol, optional
            Default value is 't';
            otherwise the provided symbol is used.

        Returns
        =======

        plot_interval : list (plot interval)
            [parameter, lower_bound, upper_bound]

        See Also
        ========

        limits : Returns limits of the parameter interval

        Examples
        ========

        >>> from sympy import Curve, sin
        >>> from sympy.abc import x, t, s
        >>> Curve((x, sin(x)), (x, 1, 2)).plot_interval()
        [t, 1, 2]
        >>> Curve((x, sin(x)), (x, 1, 2)).plot_interval(s)
        [s, 1, 2]

        """
        t = _symbol(parameter, self.parameter)
        return [t] + list(self.limits[1:])
def plot_interval ( self , parameter = 't' ) : t = _symbol ( parameter , self . parameter ) return [ t ] + list ( self . limits [ 1 : ] )