使用tkinter实现简易计算器：

好的，以下是一个使用 tkinter 实现的简易计算器：

import tkinter as tk

class Calculator:
    def __init__(self, master):
        self.master = master
        master.title("简易计算器")

        # 定义显示结果的文本框
        self.result_var = tk.StringVar()
        self.result_var.set('')
        self.result_entry = tk.Entry(master, textvariable=self.result_var, justify='right', font=('Arial', 16))
        self.result_entry.grid(row=0, column=0, columnspan=4, sticky='nsew')

        # 定义所有数字按钮
        numbers = [
            ['7', '8', '9'],
            ['4', '5', '6'],
            ['1', '2', '3'],
            ['0', '.', '=']
        ]
        for i, row in enumerate(numbers, start=1):
            for j, num in enumerate(row):
                button = tk.Button(master, text=num, font=('Arial', 16), command=lambda x=num: self.button_click(x))
                button.grid(row=i, column=j, sticky='nsew')

        # 定义所有运算符按钮
        operators = ['/', '*', '-', '+']
        for i, operator in enumerate(operators, start=1):
            button = tk.Button(master, text=operator, font=('Arial', 16), command=lambda x=operator: self.button_click(x))
            button.grid(row=i, column=3, sticky='nsew')

        # 定义清除和退格按钮
        clear_button = tk.Button(master, text='C', font=('Arial', 16), command=self.clear)
        clear_button.grid(row=0, column=3, sticky='nsew')
        back_button = tk.Button(master, text='<-', font=('Arial', 16), command=self.backspace)
        back_button.grid(row=0, column=2, sticky='nsew')

    def button_click(self, button):
        if button == '=':
            try:
                result = eval(self.result_var.get())
                self.result_var.set(str(result))
            except:
                self.result_var.set('Error')
        else:
            self.result_var.set(self.result_var.get() + button)

    def clear(self):
        self.result_var.set('')

    def backspace(self):
        self.result_var.set(self.result_var.get()[:-1])

root = tk.Tk()
app = Calculator(root)
root.mainloop()

这个计算器界面看起来像这样：


你可以复制以上代码并运行它。