human
Solve the following python programming problem given the following code:
def __init__(self, event_queue, watch, timeout = DEFAULT_EMITTER_TIMEOUT) : 
    EventEmitter.__init__ (self, event_queue, watch, timeout) 
    self._kq = select.kqueue () 
    self._lock = threading.RLock () 
    self._descriptors = KeventDescriptorSet () 
    def walker_callback(path, stat_info, self = self) : 
        self._register_kevent (path, stat.S_ISDIR (stat_info.st_mode)) 
self._snapshot = DirectorySnapshot (watch.path, watch.is_recursive, event_queue) 

    
    

    Fix the buggy line: self._snapshot = DirectorySnapshot (watch.path, watch.is_recursive, event_queue)
assistant
#Here is Python program to fix the buggy line: self.

self._snapshot = DirectorySnapshot (watch.path, watch.is_recursive, def walker_callback()