用tkinter做一个计算器

好的，下面是一个简单的计算器示例，使用tkinter库实现GUI界面：

from tkinter import *

class Calculator:
    def __init__(self, master):
        self.master = master
        master.title("Calculator")
        
        # 创建显示屏
        self.display = Entry(master, width=25, font=('Arial', 18), justify='right')
        self.display.grid(row=0, column=0, columnspan=4, padx=5, pady=5)
        
        # 创建按钮
        self.button_1 = Button(master, text="1", width=5, height=2, command=lambda: self.button_click('1'))
        self.button_2 = Button(master, text="2", width=5, height=2, command=lambda: self.button_click('2'))
        self.button_3 = Button(master, text="3", width=5, height=2, command=lambda: self.button_click('3'))
        self.button_4 = Button(master, text="4", width=5, height=2, command=lambda: self.button_click('4'))
        self.button_5 = Button(master, text="5", width=5, height=2, command=lambda: self.button_click('5'))
        self.button_6 = Button(master, text="6", width=5, height=2, command=lambda: self.button_click('6'))
        self.button_7 = Button(master, text="7", width=5, height=2, command=lambda: self.button_click('7'))
        self.button_8 = Button(master, text="8", width=5, height=2, command=lambda: self.button_click('8'))
        self.button_9 = Button(master, text="9", width=5, height=2, command=lambda: self.button_click('9'))
        self.button_0 = Button(master, text="0", width=5, height=2, command=lambda: self.button_click('0'))
        
        self.button_add = Button(master, text="+", width=5, height=2, command=lambda: self.button_click('+'))
        self.button_subtract = Button(master, text="-", width=5, height=2, command=lambda: self.button_click('-'))
        self.button_multiply = Button(master, text="*", width=5, height=2, command=lambda: self.button_click('*'))
        self.button_divide = Button(master, text="/", width=5, height=2, command=lambda: self.button_click('/'))
        self.button_equal = Button(master, text="=", width=5, height=2, command=self.calculate)
        self.button_clear = Button(master, text="C", width=5, height=2, command=self.clear_display)
        
        # 放置按钮
        self.button_1.grid(row=3, column=0)
        self.button_2.grid(row=3, column=1)
        self.button_3.grid(row=3, column=2)
        self.button_add.grid(row=3, column=3)
        
        self.button_4.grid(row=2, column=0)
        self.button_5.grid(row=2, column=1)
        self.button_6.grid(row=2, column=2)
        self.button_subtract.grid(row=2, column=3)
        
        self.button_7.grid(row=1, column=0)
        self.button_8.grid(row=1, column=1)
        self.button_9.grid(row=1, column=2)
        self.button_multiply.grid(row=1, column=3)
        
        self.button_0.grid(row=4, column=0)
        self.button_clear.grid(row=4, column=1)
        self.button_equal.grid(row=4, column=2)
        self.button_divide.grid(row=4, column=3)
        
        # 初始化计算器状态
        self.equation = ""
        self.result = False
    
    def button_click(self, number):
        # 在显示屏上添加数字
        self.equation += str(number)
        self.display.delete(0, END)
        self.display.insert(0, self.equation)
        
    def clear_display(self):
        # 清空显示屏
        self.equation = ""
        self.display.delete(0, END)
        
    def calculate(self):
        # 计算结果
        self.result = eval(self.equation)
        self.display.delete(0, END)
        self.display.insert(0, self.result)
        self.equation = ""

root = Tk()
my_calculator = Calculator(root)
root.mainloop()

运行代码，即可看到计算器的界面。可以通过点击按钮来输入数字和运算符，并在显示屏上显示结果。