human
Solve the following python programming problem given the following code:
def _int0oo(g1, g2, x) : 
    '
    Express integral from zero to infinity g1*g2 using a G function,
    assuming the necessary conditions are fulfilled.

    >>> from sympy.integrals.meijerint import _int0oo
    >>> from sympy.abc import s, t, m
    >>> from sympy import meijerg, S
    >>> g1 = meijerg([], [], [-S(1)/2, 0], [], s**2*t/4)
    >>> g2 = meijerg([], [], [m/2], [-m/2], t/4)
    >>> _int0oo(g1, g2, t)
    4*meijerg(((1/2, 0), ()), ((m/2,), (-m/2,)), s**(-2))/s**2
    ' 
    (eta, _) = _get_coeff_exp (x.argument, x) 
    (omega, _) = _get_coeff_exp (g2.argument, x) 
    def neg(l) : 
        return [(- x) for x in l] 
a1 = (neg (g1.bm) + list (g2.an)) 
    a2 = (list (g2.aother) + neg (g1.bother)) 
    b1 = (neg (g1.an) + list (g2.bm)) 
    b2 = (list (g2.bother) + neg (g1.aother)) 
    return (meijerg (a1, a2, b1, b2, (omega / eta)) / eta) 

    
    

    Fix the buggy line: (eta, _) = _get_coeff_exp (x.argument, x)
assistant
#Here is Python code to fix the buggy line: (eta, _) = _get_coeff_exp (x.

(eta, _) = _get_coeff_exp (g1.argument, x)