编写程序实现一个简单的运算器，要求至少实现加减乘除四则运算，运算器功能界面排布尽量接近实际的运算器，数字输入通过界面上的数字按钮进行

以下是一个简单的 Python 运算器示例代码，实现了加减乘除四则运算：

from tkinter import *

class Calculator:
    def __init__(self, master):
        self.master = master
        master.title("Calculator")

        # 创建一个文本框用于显示计算结果
        self.result_display = Entry(master, width=20, font=('Arial', 16), justify=RIGHT)
        self.result_display.grid(row=0, column=0, columnspan=4, pady=10)

        # 创建数字按钮
        self.create_button('7', 1, 0)
        self.create_button('8', 1, 1)
        self.create_button('9', 1, 2)
        self.create_button('4', 2, 0)
        self.create_button('5', 2, 1)
        self.create_button('6', 2, 2)
        self.create_button('1', 3, 0)
        self.create_button('2', 3, 1)
        self.create_button('3', 3, 2)
        self.create_button('0', 4, 1)

        # 创建运算符按钮
        self.create_button('+', 1, 3)
        self.create_button('-', 2, 3)
        self.create_button('*', 3, 3)
        self.create_button('/', 4, 3)

        # 创建其他按钮
        self.create_button('C', 4, 0)
        self.create_button('.', 4, 2)
        self.create_button('=', 5, 3)

        # 初始化变量
        self.num1 = ''
        self.num2 = ''
        self.operator = ''
        self.result = ''

    def create_button(self, text, row, column):
        button = Button(self.master, text=text, width=5, height=2, font=('Arial', 16), command=lambda:self.button_click(text))
        button.grid(row=row, column=column, padx=2, pady=2)

    def button_click(self, text):
        if text.isdigit():
            if not self.operator:
                self.num1 += text
                self.result_display.delete(0, END)
                self.result_display.insert(0, self.num1)
            else:
                self.num2 += text
                self.result_display.delete(0, END)
                self.result_display.insert(0, self.num2)
        elif text == '.':
            if self.operator and '.' not in self.num2:
                self.num2 += '.'
                self.result_display.insert(END, '.')
            elif not self.operator and '.' not in self.num1:
                self.num1 += '.'
                self.result_display.insert(END, '.')
        elif text == 'C':
            self.num1 = ''
            self.num2 = ''
            self.operator = ''
            self.result = ''
            self.result_display.delete(0, END)
        elif text in ['+', '-', '*', '/']:
            if self.num1 and self.num2:
                self.calculate()
            self.operator = text
        elif text == '=':
            if self.num1 and self.num2:
                self.calculate()

    def calculate(self):
        num1 = float(self.num1)
        num2 = float(self.num2)
        if self.operator == '+':
            self.result = num1 + num2
        elif self.operator == '-':
            self.result = num1 - num2
        elif self.operator == '*':
            self.result = num1 * num2
        elif self.operator == '/':
            self.result = num1 / num2
        self.num1 = str(self.result)
        self.num2 = ''
        self.operator = ''
        self.result_display.delete(0, END)
        self.result_display.insert(0, self.result)

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

使用 Tkinter 模块创建 GUI 界面，实现了数字按钮、运算符按钮、清除按钮和等于按钮的功能，同时实现了数字输入、小数点输入、运算符选择和计算等功能。