human
Solve the following python programming problem given the following code:
def test_scope2(self) : 
    def func1(self) : 
        x = 1 
def func2(self) : 
        x = 1 
        y = (lambda : None) 
def func3(self) : 
        x = 1 
        def y() : 
            pass 
assert ('var x' in py2js (self)) 
    assert ('var x' in py2js (func2)) 
    assert ('var x' in py2js (func3)) 

    
    

    Fix the buggy line: assert ('var x' in py2js (self))
assistant
#Here is Python code to fix the buggy line: assert ('var x' in py2js (self))
.

assert ('var x' in py2js (def func1())