human
Solve the following python programming problem given the following code:
@ run_in_both (Person, "['jane', 'jansen', 0, 0, 2]") 
def test_handler_calling(Person) : 
    res1 = [] 
    res2 = [] 
    def func1(* events) : 
        res2.append (len (events)) 
        for ev in events : 
            res1.append (ev.new_value) 
name = Person () 
    handler1 = name.connect (func1, 'first_name', 'last_name') 
    assert (len (res2) == 0) 
    handler1 () 
    assert (len (res1) == 1) 
    func1 () 
    assert (len (res2) == 2) 
    name.first_name = 'jane' 
    name.last_name = 'jansen' 
    assert (len (res2) == 2) 
    handler1.handle_now () 
    assert (len (res2) == 3) 
    return (res1 + res2) 

    
    

    Fix the buggy line: assert (len (res1) == 1)
assistant
#Here is Python code to fix the buggy line: assert (len (res1) == 1)
.

assert (len (res2) == 1)