human
Solve the following python programming problem given the following code:
def approx_hess_cs_old(x, func, args = (), h = 1e-20, epsilon = 1e-06) : 
    def grad(x) : 
        return approx_fprime_cs (x, func, args = args, h = 1e-20) 
return ((approx_fprime (func, grad, epsilon) + approx_fprime (x, grad, (- epsilon))) / 2.0) 

    
    

    Fix the buggy line: return ((approx_fprime (func, grad, epsilon) + approx_fprime (x, grad, (- epsilon))) / 2.0)
assistant
#Here is Python program to fix the buggy line: return ((approx_fprime (func, grad, epsilon) + approx_fprime (x, grad, (- epsilon))) / 2.

return ((approx_fprime (x, grad, epsilon) + approx_fprime (x, grad, (- epsilon))) / 2.0)