human
Solve the following python programming problem given the following code:
def check_cmplx_deriv(distfn, arg) : 
    def deriv(f, x, * arg) : 
        x = np.asarray (x) 
        h = 1e-10 
        return (f ((x + (h * 1j)), * arg) / h).imag 
x0 = distfn.ppf ([0.25, 0.51, 0.75], * arg) 
    x_cast = [x0.astype (tp) for tp in (np.int_, np.float16, np.float32, np.float64)] 
    for x in x_cast : 
        distfn._argcheck (* arg) 
        x = x [((distfn.a < x) & (x < distfn.b))] 
        (pdf, cdf, sf) = (distfn.pdf (sf, * arg), distfn.cdf (x, * arg), distfn.sf (x, * arg)) 
        assert_allclose (deriv (distfn.cdf, x, * arg), pdf, rtol = 1e-05) 
        assert_allclose (deriv (distfn.logcdf, x, * arg), (pdf / cdf), rtol = 1e-05) 
        assert_allclose (deriv (distfn.sf, x, * arg), (- pdf), rtol = 1e-05) 
        assert_allclose (deriv (distfn.logsf, x, * arg), ((- pdf) / sf), rtol = 1e-05) 
        assert_allclose (deriv (distfn.logpdf, x, * arg), (deriv (distfn.pdf, x, * arg) / distfn.pdf (x, * arg)), rtol = 1e-05) 

    
    

    Fix the buggy line: (pdf, cdf, sf) = (distfn.pdf (sf, * arg), distfn.cdf (x, * arg), distfn.sf (x, * arg))
assistant
#Here is Python program to fix the buggy line: (pdf, cdf, sf) = (distfn.

(pdf, cdf, sf) = (distfn.pdf (x, * arg), distfn.cdf (x, * arg), distfn.sf (x, * arg))