python迷你计算器

以下是一个简单的Python GUI计算器的例子，使用tkinter模块实现：

from tkinter import *

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

        # 创建显示屏
        self.screen = Text(master, state='disabled', width=30, height=3, background="yellow", foreground="blue")

        # 设置显示屏的位置
        self.screen.grid(row=0, column=0, columnspan=4, padx=5, pady=5)
        self.screen.configure(state='normal')

        # 初始化变量
        self.equation = ''

        # 创建按钮
        button_1 = self.create_button(7)
        button_2 = self.create_button(8)
        button_3 = self.create_button(9)
        button_4 = self.create_button(u"\u232B", None)
        button_5 = self.create_button(4)
        button_6 = self.create_button(5)
        button_7 = self.create_button(6)
        button_8 = self.create_button(u"\u00F7")
        button_9 = self.create_button(1)
        button_10 = self.create_button(2)
        button_11 = self.create_button(3)
        button_12 = self.create_button('*')
        button_13 = self.create_button('.')
        button_14 = self.create_button(0)
        button_15 = self.create_button('+')
        button_16 = self.create_button('-')
        button_17 = self.create_button('=', None, 34)

        # 将按钮放置在计算器上
        buttons = [button_1, button_2, button_3, button_4, button_5, button_6, button_7, button_8, button_9, button_10, button_11, button_12, button_13, button_14, button_15, button_16, button_17]

        row = 1
        col = 0
        for button in buttons:
            button.grid(row=row, column=col, padx=5, pady=5)
            col += 1
            if col > 3:
                col = 0
                row += 1

    def create_button(self, val, write=True, width=7):
        return Button(self.master, text=val, command=lambda: self.click(val, write), width=width)

    def click(self, text, write):
        if write == None:
            if text == '=' and self.equation:
                self.equation = self.equation[:-1]
            elif text == u"\u232B":
                self.equation = ''
                self.screen.configure(state='normal')
                self.screen.delete('1.0', END)
                self.screen.configure(state='disabled')
        else:
            self.equation += text
            self.screen.configure(state='normal')
            self.screen.insert(END, text)
            self.screen.configure(state='disabled')

    def evaluate(self):
        try:
            self.equation = str(eval(self.equation))
            self.screen.configure(state='normal')
            self.screen.delete('1.0', END)
            self.screen.insert(END, self.equation)
            self.screen.configure(state='disabled')
        except:
            self.screen.configure(state='normal')
            self.screen.delete('1.0', END)
            self.screen.insert(END, 'Error')
            self.screen.configure(state='disabled')

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