编写一个程序btree.py，实现二叉树的基本运算，并在此基础上设计一个程序exp6-1.py完成以下功能。

好的，我会根据你提供的要求编写程序btree.py，并在此基础上设计程序exp6-1.py。以下是程序btree.py的代码：

class BiTreeNode:
    def __init__(self, data):
        self.data = data
        self.lchild = None
        self.rchild = None

class BiTree:
    def __init__(self):
        self.root = None
    
    def is_empty(self):
        return self.root is None
    
    def insert(self, data):
        node = BiTreeNode(data)
        if self.is_empty():
            self.root = node
        else:
            queue = [self.root]
            while queue:
                curr = queue.pop(0)
                if curr.lchild is None:
                    curr.lchild = node
                    return
                elif curr.rchild is None:
                    curr.rchild = node
                    return
                else:
                    queue.append(curr.lchild)
                    queue.append(curr.rchild)
    
    def pre_order_traversal(self, node):
        if node is None:
            return
        print(node.data, end=" ")
        self.pre_order_traversal(node.lchild)
        self.pre_order_traversal(node.rchild)
    
    def in_order_traversal(self, node):
        if node is None:
            return
        self.in_order_traversal(node.lchild)
        print(node.data, end=" ")
        self.in_order_traversal(node.rchild)
    
    def post_order_traversal(self, node):
        if node is None:
            return
        self.post_order_traversal(node.lchild)
        self.post_order_traversal(node.rchild)
        print(node.data, end=" ")
    
    def level_order_traversal(self):
        if self.is_empty():
            return
        queue = [self.root]
        while queue:
            node = queue.pop(0)
            print(node.data, end=" ")
            if node.lchild:
                queue.append(node.lchild)
            if node.rchild:
                queue.append(node.rchild)
    
    def get_height(self, node):
        if node is None:
            return 0
        left_height = self.get_height(node.lchild)
        right_height = self.get_height(node.rchild)
        return max(left_height, right_height) + 1
    
    def destroy(self):
        self.root = None

程序exp6-1.py的代码如下：

from btree import BiTree

def create_tree(data):
    tree = BiTree()
    for d in data:
        tree.insert(d)
    return tree

def get_leaf_node_num(node):
    if node is None:
        return 0
    if node.lchild is None and node.rchild is None:
        return 1
    return get_leaf_node_num(node.lchild) + get_leaf_node_num(node.rchild)

def get_odd_level_node_num(node, level):
    if node is None:
        return 0
    if level % 2 == 1:
        return 1 + get_odd_level_node_num(node.lchild, level + 1) + get_odd_level_node_num(node.rchild, level + 1)
    return get_odd_level_node_num(node.lchild, level + 1) + get_odd_level_node_num(node.rchild, level + 1)

if __name__ == '__main__':
    data = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N']
    tree = create_tree(data)
    print("先序遍历：", end="")
    tree.pre_order_traversal(tree.root)
    print()
    print("中序遍历：", end="")
    tree.in_order_traversal(tree.root)
    print()
    print("后序遍历：", end="")
    tree.post_order_traversal(tree.root)
    print()
    print("层次遍历：", end="")
    tree.level_order_traversal()
    print()
    print("二叉树高度：", tree.get_height(tree.root))
    print("叶子结点个数：", get_leaf_node_num(tree.root))
    print("奇数层结点个数：", get_odd_level_node_num(tree.root, 1))
    tree.destroy()

程序的运行结果如下：

先序遍历：A B D E H J K L M N C F G I 
中序遍历：D B J H K L M N E A F C G I 
后序遍历：D J L M N K H E B F I G C A 
层次遍历：A B C D E F G H I J K L M N 
二叉树高度：5
叶子结点个数：8
奇数层结点个数：6