human
Solve the following python programming problem given the following code:
@ with_sitl 
def test_location_notify(connpath) : 
    vehicle = connect (callback) 
    ret = { 
        'success' : False, 
} 
    @ vehicle.location.on_attribute ('global_frame') 
    def callback(* args) : 
        assert_not_equals (args [2].alt, 0) 
        ret ['success'] = True 
wait_for ((lambda : ret ['success']), 30) 
    assert ret ['success'], 'Expected location object to emit notifications.' 

    
    

    Fix the buggy line: vehicle = connect (callback)
assistant
#Here is Python program to fix the buggy line: vehicle = connect (callback)
.

vehicle = connect (connpath)