human
Solve the following python programming problem given the following code:
@ lower ('np.random.wald', types.Float, types.Float) 
def wald_impl(context, builder, sig, args) : 
    def wald_impl(mean, scale) : 
        if (mean <= 0.0) : 
            raise ValueError ('wald(): mean <= 0') 
if (scale <= 0.0) : 
            raise ValueError ('wald(): scale <= 0') 
mu_2l = (mean / (2.0 * scale)) 
        Y = np.random.standard_normal () 
        Y = ((mean * Y) * Y) 
        X = (mean + (mu_2l * (Y - math.sqrt ((((4 * scale) * Y) + (Y * Y)))))) 
        U = np.random.random () 
        if (U <= (mean / (mean + X))) : 
            return X 
else : 
            return ((mean * mean) / X) 
res = context.compile_internal (builder, sig, sig, args) 
    return impl_ret_untracked (context, builder, sig.return_type, res) 

    
    

    Fix the buggy line: res = context.compile_internal (builder, sig, sig, args)
assistant
#Here is Python program to fix the buggy line: res = context.

res = context.compile_internal (builder, def wald_impl(, sig, args)