Exercise 15

Traverse a binary tree recursively.

Name		Name	Last commit message	Last commit date
Latest commit History 3 Commits
__pycache__		__pycache__
ex6.py		ex6.py
exercise11.py		exercise11.py
exercise11.pyc		exercise11.pyc
readme.md		readme.md
test_tree.py		test_tree.py
test_tree_fixed.py		test_tree_fixed.py

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