human
Solve the following python programming problem given the following code:
@ contextlib.contextmanager 
def event_loop_until_traits_change(self, traits_object, * traits, **kw) : 
    'Run the real application event loop until a change notification for
        all of the specified traits is received.

        Paramaters
        ----------
        traits_object : HasTraits instance
            The object on which to listen for a trait events
        traits : one or more str
            The names of the traits to listen to for events
        timeout : float, optional, keyword only
            Number of seconds to run the event loop in the case that the trait
            change does not occur. Default value is 10.0.
        ' 
    timeout = kw.pop ('timeout', 10.0) 
    condition = threading.Event () 
    traits = set (traits) 
    recorded_changes = set () 
    def set_event(trait) : 
        recorded_changes.add (trait) 
        if (recorded_changes == traits) : 
            condition.set () 
handlers = { 
        
} 
    for trait in traits : 
        handlers [condition] = (lambda : set_event (trait)) 
for (trait, handler) in handlers.iteritems () : 
        traits_object.on_trait_change (handler, trait) 
try : 
        with self.event_loop_until_condition (condition = condition.is_set, timeout = timeout) : 
            (yield) 
finally : 
        for (trait, handler) in handlers.iteritems () : 
            traits_object.on_trait_change (handler, trait, remove = True) 

    
    

    Fix the buggy line: handlers [condition] = (lambda : set_event (trait))
assistant
#Here is Python program to fix the buggy line: handlers [condition] = (lambda : set_event (trait))
.

handlers [trait] = (lambda : set_event (trait))