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Move bst to a class

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This commit is contained in:
Donne Martin
2016-08-14 08:20:06 -04:00
parent be5f29f98e
commit 82c9725000
4 changed files with 119 additions and 81 deletions
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80
graphs_trees/bst/bst_solution.ipynb
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@@ -127,25 +127,37 @@
" return str(self.data)\n",
"\n",
"\n",
"def insert(root, data):\n",
" # Constraint: Assume we are working with valid ints\n",
" if root is None:\n",
" root = Node(data)\n",
" return root\n",
" if data <= root.data:\n",
" if root.left is None:\n",
" root.left = insert(root.left, data)\n",
" root.left.parent = root\n",
" return root.left\n",
"class Bst(object):\n",
"\n",
" def __init__(self, root=None):\n",
" self.root = root\n",
"\n",
" def insert(self, data):\n",
" if data is None:\n",
" raise Exception('Data cannot be None')\n",
" if self.root is None:\n",
" self.root = Node(data)\n",
" return self.root\n",
" return self._insert(self.root, data)\n",
"\n",
" def _insert(self, node, data):\n",
" # Constraint: Assume we are working with valid ints\n",
" if node is None:\n",
" return Node(data)\n",
" if data <= node.data:\n",
" if node.left is None:\n",
" node.left = self._insert(node.left, data)\n",
" node.left.parent = node\n",
" return node.left\n",
" else:\n",
" return self._insert(node.left, data)\n",
" else:\n",
" return insert(root.left, data)\n",
" else:\n",
" if root.right is None:\n",
" root.right = insert(root.right, data)\n",
" root.right.parent = root\n",
" return root.right\n",
" else:\n",
" return insert(root.right, data)"
" if node.right is None:\n",
" node.right = self._insert(node.right, data)\n",
" node.right.parent = node\n",
" return node.right\n",
" else:\n",
" return self._insert(node.right, data)"
]
},
{
@@ -213,22 +225,25 @@
" def __init__(self):\n",
" self.results = Results()\n",
"\n",
" def test_tree(self):\n",
" node = Node(5)\n",
" assert_equal(insert(node, 2).data, 2)\n",
" assert_equal(insert(node, 8).data, 8)\n",
" assert_equal(insert(node, 1).data, 1)\n",
" assert_equal(insert(node, 3).data, 3)\n",
" in_order_traversal(node, self.results.add_result)\n",
" def test_tree_one(self):\n",
" bst = Bst()\n",
" bst.insert(5)\n",
" bst.insert(2)\n",
" bst.insert(8)\n",
" bst.insert(1)\n",
" bst.insert(3)\n",
" in_order_traversal(bst.root, self.results.add_result)\n",
" assert_equal(str(self.results), '[1, 2, 3, 5, 8]')\n",
" self.results.clear_results()\n",
"\n",
" node = insert(None, 1)\n",
" assert_equal(insert(node, 2).data, 2)\n",
" assert_equal(insert(node, 3).data, 3)\n",
" assert_equal(insert(node, 4).data, 4)\n",
" insert(node, 5)\n",
" in_order_traversal(node, self.results.add_result)\n",
" def test_tree_two(self):\n",
" bst = Bst()\n",
" bst.insert(1)\n",
" bst.insert(2)\n",
" bst.insert(3)\n",
" bst.insert(4)\n",
" bst.insert(5)\n",
" in_order_traversal(bst.root, self.results.add_result)\n",
" assert_equal(str(self.results), '[1, 2, 3, 4, 5]')\n",
"\n",
" print('Success: test_tree')\n",
@@ -236,7 +251,8 @@
"\n",
"def main():\n",
" test = TestTree()\n",
" test.test_tree()\n",
" test.test_tree_one()\n",
" test.test_tree_two()\n",
"\n",
"\n",
"if __name__ == '__main__':\n",