human
Solve the following python programming problem given the following code:
def _graph_example(n = 4) : 
    from string import ascii_uppercase as labels 
    from random import Random 
    n = min (n, 26) 
    class Node (object) : 
        def __init__(self, letter) : 
            self.letter = str (letter) 
            self.neigh = list () 
def __str__(self) : 
            return self.letter 
__repr__ = __str__ 
nodes = [Node (x) for x in labels [: neighmax]] 
    ran = Random () 
    ran.seed (6164554331563) 
    neighmax = 3 
    for n in nodes : 
        n.neigh [:] = sorted ((x for x in ran.sample (nodes, neighmax) if (x is not n)), key = (lambda n : n.letter)) 
for path in walk (nodes [0], (lambda n : n.neigh), event ((~ 0)), tree = False) : 
        print (list (path), '{0:<7}'.format (event_repr (path.event))) 

    
    

    Fix the buggy line: nodes = [Node (x) for x in labels [: neighmax]]
assistant
#Here is Python program to fix the buggy line: nodes = [Node (x) for x in labels [: neighmax]]
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nodes = [Node (x) for x in labels [: n]]