如何在 Python 中创建一个类似于 MS 计算器的 GUI 计算器

import tkinter as tk

class Calculator:
    def __init__(self):
        self.window = tk.Tk()
        self.window.title("Calculator")

        # 创建显示屏
        self.display = tk.Entry(self.window, width=30)
        self.display.grid(row=0, column=0, columnspan=4)

        # 创建数字按钮
        self.buttons = [
            ["7", "8", "9", "/"],
            ["4", "5", "6", "*"],
            ["1", "2", "3", "-"],
            ["0", ".", "=", "+"]
        ]

        # 创建运算符按钮
        self.operators = ["/", "*", "-", "+"]

        # 创建状态变量
        self.state = "number"

        # 创建数字列表
        self.numbers = []

        # 创建运算符列表
        self.operators = []

        # 创建计算结果变量
        self.result = None

        # 创建按钮
        for row in range(4):
            for column in range(4):
                button = tk.Button(self.window, text=self.buttons[row][column], command=lambda row=row, column=column: self.handle_button_press(row, column))
                button.grid(row=row+1, column=column)

    def handle_button_press(self, row, column):
        # 获取按钮值
        button_value = self.buttons[row][column]

        # 检查按钮值是否是数字
        if button_value in "0123456789.":
            # 如果是数字，则将数字添加到数字列表
            self.numbers.append(button_value)

            # 更新显示屏
            self.display.delete(0, tk.END)
            self.display.insert(0, "".join(self.numbers))

        # 检查按钮值是否是运算符
        elif button_value in self.operators:
            # 如果是运算符，则将运算符添加到运算符列表
            self.operators.append(button_value)

            # 改变状态
            self.state = "operator"

            # 更新显示屏
            self.display.delete(0, tk.END)
            self.display.insert(0, "".join(self.operators))

        # 检查按钮值是否是等号
        elif button_value == "=":
            # 如果是等号，则执行计算
            self.result = eval("".join(self.numbers) + self.operators[0] + "".join(self.numbers))

            # 更新显示屏
            self.display.delete(0, tk.END)
            self.display.insert(0, self.result)

            # 重置状态
            self.state = "number"

            # 清空数字列表和运算符列表
            self.numbers = []
            self.operators = []

    def run(self):
        self.window.mainloop()

if __name__ == "__main__":
    calculator = Calculator()
    calculator.run()