@public
def intervals(F, all=False, eps=None, inf=None, sup=None, strict=False, fast=False, sqf=False):
    """
    Compute isolating intervals for roots of ``f``.

    Examples
    ========

    >>> from sympy import intervals
    >>> from sympy.abc import x

    >>> intervals(x**2 - 3)
    [((-2, -1), 1), ((1, 2), 1)]
    >>> intervals(x**2 - 3, eps=1e-2)
    [((-26/15, -19/11), 1), ((19/11, 26/15), 1)]

    """
    if not hasattr(F, '__iter__'):
        try:
            F = Poly(F)
        except GeneratorsNeeded:
            return []

        return F.intervals(all=all, eps=eps, inf=inf, sup=sup, fast=fast, sqf=sqf)
    else:
        polys, opt = parallel_poly_from_expr(F, domain='QQ')

        if 1 > len(opt.gens):
            raise MultivariatePolynomialError

        for i, poly in enumerate(polys):
            polys[i] = poly.rep.rep

        if eps is not None:
            eps = opt.domain.convert(eps)

            if eps <= 0:
                raise ValueError("'eps' must be a positive rational")

        if inf is not None:
            inf = opt.domain.convert(inf)
        if sup is not None:
            sup = opt.domain.convert(sup)

        intervals = dup_isolate_real_roots_list(polys, opt.domain,
            eps=eps, inf=inf, sup=sup, strict=strict, fast=fast)

        result = []

        for (s, t), indices in intervals:
            s, t = opt.domain.to_sympy(s), opt.domain.to_sympy(t)
            result.append(((s, t), indices))

        return result
dataset/ETHPy150Open sympy/sympy/sympy/polys/polytools.py/intervals/swapped operands of `>`