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107 lines
2.4 KiB
Python
107 lines
2.4 KiB
Python
'''
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A AVL tree
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'''
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class Node:
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def __init__(self, label):
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self.label = label
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self.left = None
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self.rigt = None
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self.parent = None
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self.height = 0
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def getLabel(self):
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return self.label
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def setLabel(self, label):
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self.label = label
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def getLeft(self):
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return self.left
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def setLeft(self, left):
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self.left = left
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def getRight(self):
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return self.rigt
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def setRight(self, right):
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self.rigt = right
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def getParent(self):
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return self.parent
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def setParent(self, parent):
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self.parent = parent
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def setHeight(self, height):
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self.height = height
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def getHeight(self, height):
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return self.height
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class AVL:
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def __init__(self):
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self.root = None
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self.size = 0
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# def __init__(self, root):
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# self.root = root
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# self.size = 1
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def insert(self, value):
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node = Node(value)
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if self.root is None:
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self.root = node
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self.size = 1
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else:
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# Same as Binary Tree
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dad_node = None
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curr_node = self.root
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while True:
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if curr_node is not None:
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dad_node = curr_node
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if node.getLabel() < curr_node.getLabel():
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curr_node = curr_node.getLeft()
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else:
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curr_node = curr_node.getRight()
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else:
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if node.getLabel() < dad_node.getLabel():
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dad_node.setLeft(node)
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dad_node.setHeight(dad_node.getHeight() + 1)
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if (dad_node.getRight().getHeight() -
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dad_node.getLeft.getHeight() > 1):
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self.rebalance(dad_node)
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else:
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dad_node.setRight(node)
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dad_node.setHeight(dad_node.getHeight() + 1)
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if (dad_node.getRight().getHeight() -
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dad_node.getLeft.getHeight() > 1):
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self.rebalance(dad_node)
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break
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def rebalance(self, node):
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pass
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def rotate_left(self, node):
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pass
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def rotate_right(self, node):
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pass
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def double_rotate_left(self, node):
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pass
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def double_rotate_righs(self, node):
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pass
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