写一段python代码利用python GUI创造一个计算器要求具有加减乘除的功能

以下是一个简单的Python GUI计算器的代码示例：

import tkinter as tk

# 计算器操作函数
def calculate():
    try:
        num1 = float(entry1.get())
        num2 = float(entry2.get())
        operator = operator_var.get()
        if operator == "+":
            result = num1 + num2
        elif operator == "-":
            result = num1 - num2
        elif operator == "*":
            result = num1 * num2
        elif operator == "/":
            if num2 == 0:
                result = "错误：除数不能为0"
            else:
                result = num1 / num2
        else:
            result = "错误：未知操作符"
        result_label.config(text=result)
    except ValueError:
        result_label.config(text="错误：请输入数字")

# 创建主窗口
root = tk.Tk()
root.title("计算器")

# 创建输入框和标签
entry1 = tk.Entry(root, width=10)
entry1.grid(row=0, column=0)
entry2 = tk.Entry(root, width=10)
entry2.grid(row=0, column=2)
operator_var = tk.StringVar()
operator_var.set("+")
operator_label = tk.Label(root, textvariable=operator_var, width=2)
operator_label.grid(row=0, column=1)

# 创建按钮和标签
plus_button = tk.Button(root, text="+", width=5, command=calculate)
plus_button.grid(row=1, column=0)
minus_button = tk.Button(root, text="-", width=5, command=calculate)
minus_button.grid(row=1, column=1)
times_button = tk.Button(root, text="*", width=5, command=calculate)
times_button.grid(row=1, column=2)
divide_button = tk.Button(root, text="/", width=5, command=calculate)
divide_button.grid(row=1, column=3)
result_label = tk.Label(root, text="结果", width=10)
result_label.grid(row=2, column=0, columnspan=4)

# 进入事件循环
root.mainloop()

该程序使用了tkinter模块创建了一个简单的GUI界面，并且实现了加、减、乘、除四则运算。用户可以在两个输入框中输入数字，选择运算符，然后点击对应的按钮进行计算，结果会显示在标签中。需要注意的是，程序对输入进行了简单的错误处理，例如输入非数字或除数为0等情况