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class Tree: def __init__(self,val=None): # Initialize the Tree node with a value self.value = val # If the node has a value, #create left and right children nodes if self.value: self.left = Tree() self.right = Tree() else: # If the node has no value, #set left and right children to None self.left = None self.right = None # Check if the node is empty (has no value) def isempty(self): return (self.value == None) # Insert a new value into the tree def insert(self,data): # If the node is empty, insert the data here if self.isempty(): self.value = data # Create left and right children #for the inserted node self.left = Tree() self.right = Tree() print("{} is inserted successfully".format(self.value)) # If data is less than current node value, #insert into left subtree elif data < self.value: self.left.insert(data) return # If data is greater than current node value, #insert into right subtree elif data > self.value: self.right.insert(data) # If data is equal to current node value, do nothing elif data == self.value: return # Create a tree with root value 15 t = Tree(15) # Insert some values into the tree t.insert(10) t.insert(18) t.insert(4) t.insert(11) t.insert(16) t.insert(20) t.insert(13)

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