human
Solve the following python programming problem given the following code:
def _vonmisesvariate_impl(context, builder, sig, args, _random) : 
    _exp = math.exp 
    _sqrt = math.sqrt 
    _cos = math.cos 
    _acos = math.acos 
    _pi = math.pi 
    TWOPI = (2.0 * _pi) 
    def vonmisesvariate_impl(mu, kappa) : 
        'Circular data distribution.  Taken from CPython.
        Note the algorithm in Python 2.6 and Numpy is different:
        http://bugs.python.org/issue17141
        ' 
        if (kappa <= 1e-06) : 
            return (TWOPI * _random ()) 
s = (0.5 / kappa) 
        r = (s + _sqrt ((1.0 + (s * s)))) 
        while 1 : 
            u1 = _random () 
            z = _cos ((_pi * u1)) 
            d = (z / (r + z)) 
            u2 = _random () 
            if ((u2 < (1.0 - (d * d))) or (u2 <= ((1.0 - d) * _exp (d)))) : 
                break 
q = (1.0 / r) 
        f = ((q + z) / (1.0 + (q * z))) 
        u3 = _random () 
        if (u3 > 0.5) : 
            theta = ((mu + _acos (f)) % TWOPI) 
else : 
            theta = ((mu - _acos (f)) % TWOPI) 
return theta 
return context.compile_internal (builder, _acos, sig, args) 

    
    

    Fix the buggy line: return context.compile_internal (builder, _acos, sig, args)
assistant
#Here is Python code to fix the buggy line: return context.

return context.compile_internal (builder, def vonmisesvariate_impl(, sig, args)