human
Solve the following python programming problem given the following code:
def _findPattern(self, t, pattern) : 
    'Return a List of subtrees matching pattern.' 
    subtrees = [] 
    tokenizer = TreePatternLexer (pattern) 
    parser = TreePatternParser (self, self, TreePatternTreeAdaptor ()) 
    tpattern = parser.pattern () 
    if ((tpattern is None) or tpattern.isNil () or isinstance (tpattern, WildcardTreePattern)) : 
        return None 
rootTokenType = tpattern.getType () 
    def visitor(tree, parent, childIndex, label) : 
        if self._parse (tree, tpattern, None) : 
            subtrees.append (tree) 
self.visit (t, rootTokenType, visitor) 
    return subtrees 

    
    

    Fix the buggy line: parser = TreePatternParser (self, self, TreePatternTreeAdaptor ())
assistant
#Here is Python program to fix the buggy line: parser = TreePatternParser (self, self, TreePatternTreeAdaptor ())
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parser = TreePatternParser (tokenizer, self, TreePatternTreeAdaptor ())