python（GUI）Tkinter制作简易计算器

好的，下面是一个使用 Tkinter GUI 库制作的 Python 计算器的代码示例：

import tkinter as tk

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

        # 创建输入框
        self.entry = tk.Entry(master, width=35, borderwidth=5)
        self.entry.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

        # 创建按钮
        self.button_1 = tk.Button(master, text="1", padx=40, pady=20, command=lambda: self.button_click(1))
        self.button_2 = tk.Button(master, text="2", padx=40, pady=20, command=lambda: self.button_click(2))
        self.button_3 = tk.Button(master, text="3", padx=40, pady=20, command=lambda: self.button_click(3))
        self.button_4 = tk.Button(master, text="4", padx=40, pady=20, command=lambda: self.button_click(4))
        self.button_5 = tk.Button(master, text="5", padx=40, pady=20, command=lambda: self.button_click(5))
        self.button_6 = tk.Button(master, text="6", padx=40, pady=20, command=lambda: self.button_click(6))
        self.button_7 = tk.Button(master, text="7", padx=40, pady=20, command=lambda: self.button_click(7))
        self.button_8 = tk.Button(master, text="8", padx=40, pady=20, command=lambda: self.button_click(8))
        self.button_9 = tk.Button(master, text="9", padx=40, pady=20, command=lambda: self.button_click(9))
        self.button_0 = tk.Button(master, text="0", padx=40, pady=20, command=lambda: self.button_click(0))
        self.button_add = tk.Button(master, text="+", padx=39, pady=20, command=self.button_add)
        self.button_subtract = tk.Button(master, text="-", padx=41, pady=20, command=self.button_subtract)
        self.button_multiply = tk.Button(master, text="*", padx=40, pady=20, command=self.button_multiply)
        self.button_divide = tk.Button(master, text="/", padx=41, pady=20, command=self.button_divide)
        self.button_equal = tk.Button(master, text="=", padx=91, pady=20, command=self.button_equal)
        self.button_clear = tk.Button(master, text="清除", padx=79, pady=20, command=self.button_clear)

        # 把按钮放在界面上
        self.button_1.grid(row=1, column=0)
        self.button_2.grid(row=1, column=1)
        self.button_3.grid(row=1, column=2)

        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_7.grid(row=3, column=0)
        self.button_8.grid(row=3, column=1)
        self.button_9.grid(row=3, column=2)

        self.button_0.grid(row=4, column=0)
        self.button_clear.grid(row=4, column=1, columnspan=2)
        self.button_add.grid(row=5, column=0)
        self.button_subtract.grid(row=6, column=0)
        self.button_multiply.grid(row=6, column=1)
        self.button_divide.grid(row=6, column=2)
        self.button_equal.grid(row=5, column=1, columnspan=2)

        # 定义操作函数
        self.current_num = ""
        self.first_num = None
        self.operation = None

    def button_click(self, number):
        self.current_num = str(self.current_num) + str(number)
        self.entry.delete(0, tk.END)
        self.entry.insert(0, self.current_num)

    def button_clear(self):
        self.entry.delete(0, tk.END)
        self.current_num = ""
        self.first_num = None
        self.operation = None

    def button_add(self):
        self.first_num = float(self.current_num)
        self.operation = "+"
        self.entry.delete(0, tk.END)
        self.current_num = ""

    def button_multiply(self):
        self.first_num = float(self.current_num)
        self.operation = "*"
        self.entry.delete(0, tk.END)
        self.current_num = ""

    def button_subtract(self):
        self.first_num = float(self.current_num)
        self.operation = "-"
        self.entry.delete(0, tk.END)
        self.current_num = ""

    def button_divide(self):
        self.first_num = float(self.current_num)
        self.operation = "/"
        self.entry.delete(0, tk.END)
        self.current_num = ""

    def button_equal(self):
        second_num = float(self.current_num)
        self.entry.delete(0, tk.END)

        if self.operation == "+":
            result = self.first_num + second_num
        elif self.operation == "-":
            result = self.first_num - second_num
        elif self.operation == "*":
            result = self.first_num * second_num
        elif self.operation == "/":
            result = self.first_num / second_num

        self.entry.insert(0, result)
        self.current_num = ""
        self.first_num = None
        self.operation = None

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

这个计算器使用了 Tkinter GUI 库来创建用户界面。用户可以通过按钮输入数字和运算符，计算器会在输入框中显示结果。