(self)
return [l[0] for l in self.limits]
Return a list of the dummy variables

        >>> from sympy import Sum
        >>> from sympy.abc import x, i
        >>> Sum(x**i, (i, 1, 3)).variables
        [i]

        See Also
        ========

        function, limits, free_symbols
        as_dummy : Rename dummy variables
        transform : Perform mapping on the dummy variable
Return a list of the dummy variables
Return a list of the dummy variables
def variables(self):
        """Return a list of the dummy variables

        >>> from sympy import Sum
        >>> from sympy.abc import x, i
        >>> Sum(x**i, (i, 1, 3)).variables
        [i]

        See Also
        ========

        function, limits, free_symbols
        as_dummy : Rename dummy variables
        transform : Perform mapping on the dummy variable
        """
        return [l[0] for l in self.limits]
def variables ( self ) : return [ l [ 0 ] for l in self . limits ]