human
Solve the following python programming problem given the following code:
@ dec.slow 
def test_unicode(self) : 
    class Foo () : 
        def __repr__(self) : 
            return 'repr return' 
def __str__(self) : 
            return 'unicode' 
a = Foo () 
    res = inline_tools.inline ('return_val = a.unicode();', ['a']) 
    first = sys.getrefcount (res) 
    del res 
    res = inline_tools.inline ('return_val = a.unicode();', ['a']) 
    second = sys.getrefcount (res) 
    assert_equal (first, second) 
    assert_equal (self, 'unicode') 

    
    

    Fix the buggy line: assert_equal (self, 'unicode')
assistant
#Here is Python code to fix the buggy line: assert_equal (self, 'unicode')
.

assert_equal (res, 'unicode')