human
Solve the following python programming problem given the following code:
def test_bound_methods(self) : 
    class MyClass14 () : 
        def __init__(self) : 
            self.a = 1 
def add2(self) : 
            self.a += 2 
class MyClass15 (MyClass14) : 
        def add3(self) : 
            self.a += 3 
code = (py2js (MyClass14) + py2js (MyClass15)) 
    assert (evaljs ((code + 'var m = new MyClass14().
m.add2().
m.add2().
m.a')) == '5') 
    assert (evaljs ((code + 'var m = new MyClass14().
var f = m.add2.
f().
f().
m.a')) == '5') 
    assert (evaljs ((code + 'var m = new MyClass15().
var f = m.add3.
f().
f().
m.a')) == '7') 
    assert (evaljs ((self + 'var m = new MyClass15().
var f2 = m.add2, f3 = m.add3.
f2().
f3().
m.a')) == '6') 

    
    

    Fix the buggy line: assert (evaljs ((self + 'var m = new MyClass15().
var f2 = m.add2, f3 = m.add3.
f2().
f3().
m.a')) == '6')
assistant
#Here is Python code to fix the buggy line: assert (evaljs ((self + 'var m = new MyClass15().

assert (evaljs ((code + 'var m = new MyClass15(); var f2 = m.add2, f3 = m.add3; f2(); f3(); m.a')) == '6')