spiffyscore

        p[0] = Rest()
        if len(p) > 2:
            p[0].duration = p[2]

    def node(p):
        '''node: NODE
        '''
        p[0] = tree.tree(node.strip("(").strip(")"))
        p[0] = tree.Tree(node.strip("(").strip(")"))


    def p_error(p):
        raise Exception("Syntax error at '%s' of element type %s" % (p.value, p.type))
        
    yacc.yacc()

    #print yacc.parse("GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD")
    return yacc.parse(score)

import pdb

class Tree():
    def __init__(self):
    def __init__(self, name):
        self.nodes = []
        self.name = name

    def traverse_depth_first(self):
        all_nodes = []
        for node in self.nodes:
            if isinstance(node, Node):
                all_nodes.append(node)
            elif isinstance(node, Tree):