用Python实现树的可视化

import tkinter as tk

class Node:
    def __init__(self, value):
        self.value = value
        self.left = None
        self.right = None

def create_tree():
    root = Node('pidancode.com')
    root.left = Node('Python')
    root.right = Node('Data Science')
    root.left.left = Node('Web Development')
    root.left.right = Node('Machine Learning')
    root.right.left = Node('Statistical Analysis')
    root.right.right = Node('Visualization')
    return root

def draw_tree(node, canvas, x, y, x_dist=50, y_dist=50):
    if not node:
        return
    canvas.create_oval(x-20, y-20, x+20, y+20, fill='white')
    canvas.create_text(x, y, text=node.value)
    if node.left:
        canvas.create_line(x, y, x-x_dist, y+y_dist)
        draw_tree(node.left, canvas, x-x_dist, y+y_dist, x_dist/2, y_dist)
    if node.right:
        canvas.create_line(x, y, x+x_dist, y+y_dist)
        draw_tree(node.right, canvas, x+x_dist, y+y_dist, x_dist/2, y_dist)

root = create_tree()

window = tk.Tk()
canvas = tk.Canvas(window, width=600, height=400)
canvas.pack()

draw_tree(root, canvas, 300, 50)

window.mainloop()