简易计算器，窗口界面自由发挥，编程实现两个整数的加、减、乘、除操作。要求如下: (1). 首先进行操作数文本框检验，检验输入数据是否为纯数字； (2). 通过分别单击加、减、乘、除按钮，对操作数1与操作数2进行相应加、减、乘、除操作，并且将其结果写入操作3文本框

好的，这是一个简单的计算器界面和实现代码：

import tkinter as tk

class Calculator:
    def __init__(self, root):
        self.root = root
        self.root.title("简易计算器")
        self.root.geometry("300x200")

        # 操作数1文本框
        self.num1_label = tk.Label(self.root, text="操作数1")
        self.num1_label.grid(row=0, column=0, padx=5, pady=5, sticky=tk.W)

        self.num1_entry = tk.Entry(self.root)
        self.num1_entry.grid(row=0, column=1, padx=5, pady=5)

        # 操作数2文本框
        self.num2_label = tk.Label(self.root, text="操作数2")
        self.num2_label.grid(row=1, column=0, padx=5, pady=5, sticky=tk.W)

        self.num2_entry = tk.Entry(self.root)
        self.num2_entry.grid(row=1, column=1, padx=5, pady=5)

        # 操作3文本框
        self.num3_label = tk.Label(self.root, text="结果")
        self.num3_label.grid(row=2, column=0, padx=5, pady=5, sticky=tk.W)

        self.num3_entry = tk.Entry(self.root, state="readonly")
        self.num3_entry.grid(row=2, column=1, padx=5, pady=5)

        # 加、减、乘、除按钮
        self.add_button = tk.Button(self.root, text="+", command=self.add)
        self.add_button.grid(row=3, column=0, padx=5, pady=5)

        self.sub_button = tk.Button(self.root, text="-", command=self.sub)
        self.sub_button.grid(row=3, column=1, padx=5, pady=5)

        self.mul_button = tk.Button(self.root, text="*", command=self.mul)
        self.mul_button.grid(row=4, column=0, padx=5, pady=5)

        self.div_button = tk.Button(self.root, text="/", command=self.div)
        self.div_button.grid(row=4, column=1, padx=5, pady=5)

    # 加法
    def add(self):
        try:
            num1 = float(self.num1_entry.get())
            num2 = float(self.num2_entry.get())
            result = num1 + num2
            self.num3_entry.config(state="normal")
            self.num3_entry.delete(0, tk.END)
            self.num3_entry.insert(0, result)
            self.num3_entry.config(state="readonly")
        except ValueError:
            self.num3_entry.config(state="normal")
            self.num3_entry.delete(0, tk.END)
            self.num3_entry.insert(0, "请输入数字")
            self.num3_entry.config(state="readonly")

    # 减法
    def sub(self):
        try:
            num1 = float(self.num1_entry.get())
            num2 = float(self.num2_entry.get())
            result = num1 - num2
            self.num3_entry.config(state="normal")
            self.num3_entry.delete(0, tk.END)
            self.num3_entry.insert(0, result)
            self.num3_entry.config(state="readonly")
        except ValueError:
            self.num3_entry.config(state="normal")
            self.num3_entry.delete(0, tk.END)
            self.num3_entry.insert(0, "请输入数字")
            self.num3_entry.config(state="readonly")

    # 乘法
    def mul(self):
        try:
            num1 = float(self.num1_entry.get())
            num2 = float(self.num2_entry.get())
            result = num1 * num2
            self.num3_entry.config(state="normal")
            self.num3_entry.delete(0, tk.END)
            self.num3_entry.insert(0, result)
            self.num3_entry.config(state="readonly")
        except ValueError:
            self.num3_entry.config(state="normal")
            self.num3_entry.delete(0, tk.END)
            self.num3_entry.insert(0, "请输入数字")
            self.num3_entry.config(state="readonly")

    # 除法
    def div(self):
        try:
            num1 = float(self.num1_entry.get())
            num2 = float(self.num2_entry.get())
            if num2 == 0:
                raise ZeroDivisionError
            result = num1 / num2
            self.num3_entry.config(state="normal")
            self.num3_entry.delete(0, tk.END)
            self.num3_entry.insert(0, result)
            self.num3_entry.config(state="readonly")
        except ValueError:
            self.num3_entry.config(state="normal")
            self.num3_entry.delete(0, tk.END)
            self.num3_entry.insert(0, "请输入数字")
            self.num3_entry.config(state="readonly")
        except ZeroDivisionError:
            self.num3_entry.config(state="normal")
            self.num3_entry.delete(0, tk.END)
            self.num3_entry.insert(0, "除数不能为0")
            self.num3_entry.config(state="readonly")

if __name__ == '__main__':
    root = tk.Tk()
    app = Calculator(root)
    root.mainloop()

这个计算器界面有三个文本框和四个按钮，通过检查文本框中输入的内容是不是数字，实现了加、减、乘、除操作，将结果写入操作3文本框。