当我运行命令decimal时，Python tkinter不打印该命令

import tkinter as tk
from decimal import Decimal

def calculate():
    # 获取用户输入的数值
    num1 = Decimal(entry1.get())
    num2 = Decimal(entry2.get())

    # 进行十进制运算
    result = num1 + num2

    # 在标签上显示结果
    label.config(text=str(result))

# 创建GUI窗口
window = tk.Tk()

# 创建标签和输入框
label1 = tk.Label(window, text="Number 1:")
label1.pack()
entry1 = tk.Entry(window)
entry1.pack()

label2 = tk.Label(window, text="Number 2:")
label2.pack()
entry2 = tk.Entry(window)
entry2.pack()

# 创建按钮
button = tk.Button(window, text="Calculate", command=calculate)
button.pack()

# 创建用于显示结果的标签
label = tk.Label(window, text="")
label.pack()

# 运行窗口的主循环
window.mainloop()