human
Solve the following python programming problem given the following code:
def test_supers(self) : 
    class A (object) : 
        def meth(self, a) : 
            return ('A(%r)' % a) 
self.assertEqual (A ().meth (1), 'A(1)') 
    class B (A) : 
        def __init__(self) : 
            self.__super = super (B, self) 
def meth(self, a) : 
            return (('B(%r)' % a) + self.__super.meth (a)) 
self.assertEqual (B ().meth (2), 'B(2)A(2)') 
    class C (A) : 
        def meth(self, a) : 
            return (('C(%r)' % a) + self.__super.meth (a)) 
C._C__super = super (C) 
    self.assertEqual (C ().meth (3), 'C(3)A(3)') 
    class D (C, B) : 
        def meth(self, a) : 
            return (('D(%r)' % a) + super (D, self).meth (a)) 
self.assertEqual (D ().meth (4), 'D(4)C(4)B(4)A(4)') 
    try : 
        super (D, 42) 
except TypeError : 
        pass 
else : 
        self.fail ("shouldn't allow super(D, 42)") 
try : 
        super (D, C ()) 
except TypeError : 
        pass 
else : 
        self.fail ("shouldn't allow super(D, C())") 
try : 
        super (D).__get__ (12) 
except TypeError : 
        pass 
else : 
        self.fail ("shouldn't allow super(D).__get__(12)") 
try : 
        super (D).__get__ (C ()) 
except TypeError : 
        pass 
else : 
        self.fail ("shouldn't allow super(D).__get__(C())") 
class DDbase (object) : 
        def getx(self) : 
            return 42 
x = property (getx) 
class DDsub (DDbase) : 
        def getx(self) : 
            return 'hello' 
x = property (getx) 
dd = DDsub () 
    self.assertEqual (dd.x, 'hello') 
    self.assertEqual (super (DDsub, self).x, 42) 
    class Base (object) : 
        aProp = property ((lambda self : 'foo')) 
class Sub (Base) : 
        @ classmethod 
        def test(klass) : 
            return super (Sub, klass).aProp 
self.assertEqual (Sub.test (), Base.aProp) 
    try : 
        super (Base, kw = 1) 
except TypeError : 
        pass 
else : 
        self.assertEqual ("super shouldn't accept keyword args") 

    
    

    Fix the buggy line: self.assertEqual (super (DDsub, self).x, 42)
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual (super (DDsub, dd).x, 42)