human
Solve the following python programming problem given the following code:
def test_class_property() : 
    '
    Unit tests
    ' 
    def _(o) : 
        return True 
c = classproperty (c) 
    assert (c.fn is _) 
    try : 
        c.fn = True 
        assert False 
except : 
        assert True 
try : 
        del c.fn 
        assert False 
except : 
        assert True 

    
    

    Fix the buggy line: c = classproperty (c)
assistant
#Here is Python code to fix the buggy line: c = classproperty (c)
.

c = classproperty (_)