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| def printexp(tree): | |
| sVal = "" | |
| if tree: | |
| if tree.left == None and tree.right == None: return str(tree.getRootVal()) | |
| sVal = '(' + printexp(tree.getLeftChild()) | |
| sVal = sVal + str(tree.getRootVal()) | |
| sVal = sVal + printexp(tree.getRightChild())+')' | |
| return sVal |
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