human
Solve the following python programming problem given the following code:
def test_scope(self) : 
    def func(self) : 
        def foo(z) : 
            y = 2 
            stub = False 
            only_here = 1 
            return ((x + y) + z) 
x = 1 
        y = 0 
        y = 1 
        z = 1 
        res = foo (3) 
        stub = True 
        return (res + y) 
code = py2js (func) 
    i = code.splitlines ().index ('var func;') 
    assert (i >= 0) 
    vars1 = code.splitlines () [(i + 2)] 
    vars2 = code.splitlines () [(i + 4)] 
    assert vars1.strip ().startswith ('var ') 
    assert vars2.strip ().startswith ('var ') 
    assert (('y' in vars1) and ('y' in vars2)) 
    assert (('stub' in i) and ('stub' in vars2)) 
    assert (('only_here' in vars2) and ('only_here' not in vars1)) 
    assert (evaljs ((code + 'func()')) == '7') 

    
    

    Fix the buggy line: assert (('stub' in i) and ('stub' in vars2))
assistant
#Here is Python program to fix the buggy line: assert (('stub' in i) and ('stub' in vars2))
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assert (('stub' in vars1) and ('stub' in vars2))