python GUI Tkinter实现一个简易计算器

2024-02-24 01:08| 来源: 网络整理| 查看: 265

Tkinter 是 Python 的标准 GUI 库。Python 使用 Tkinter 可以快速的创建 GUI 应用程序。我们可以用它来实现一个简易计算器。

直接上代码：

# encoding=utf-8 from tkinter import * class Calculator: def __init__(self, pwindow): self.pwindow = pwindow self.num1 = 0 self.num2 = 0 self.sign = None # 运算符号 self.if_equal = None # 判断输入显示之前是否已进行过运算 self.init_pwindow() def init_pwindow(self): """父窗口相关配置""" self.pwindow.title('计算器') # 窗口名 self.pwindow.geometry('200x300+10+10') # 设置窗口的大小以及在屏幕上的位置 # 设置按钮 self.button_1 = Button(self.pwindow, text=1, width=5, command=lambda: self.show_num(1)) self.button_1.grid(row=1, column=0) self.button_2 = Button(self.pwindow, text=2, width=5, command=lambda: self.show_num(2)) self.button_2.grid(row=1, column=1) self.button_3 = Button(self.pwindow, text=3, width=5, command=lambda: self.show_num(3)) self.button_3.grid(row=1, column=2) self.button_4 = Button(self.pwindow, text=4, width=5, command=lambda: self.show_num(4)) self.button_4.grid(row=2, column=0) self.button_5 = Button(self.pwindow, text=5, width=5, command=lambda: self.show_num(5)) self.button_5.grid(row=2, column=1) self.button_6 = Button(self.pwindow, text=6, width=5, command=lambda: self.show_num(6)) self.button_6.grid(row=2, column=2) self.button_7 = Button(self.pwindow, text=7, width=5, command=lambda: self.show_num(7)) self.button_7.grid(row=3, column=0) self.button_8 = Button(self.pwindow, text=8, width=5, command=lambda: self.show_num(8)) self.button_8.grid(row=3, column=1) self.button_9 = Button(self.pwindow, text=9, width=5, command=lambda: self.show_num(9)) self.button_9.grid(row=3, column=2) self.button_0 = Button(self.pwindow, text=0, width=5, command=lambda: self.show_num(0)) self.button_0.grid(row=4, column=2) self.button_add = Button(self.pwindow, text='+', width=5, command=lambda: self.sign_num('+')) self.button_add.grid(row=4, column=0) self.button_add = Button(self.pwindow, text='-', width=5, command=lambda: self.sign_num('-')) self.button_add.grid(row=4, column=1) self.button_add = Button(self.pwindow, text='*', width=5, command=lambda: self.sign_num('*')) self.button_add.grid(row=5, column=0) self.button_add = Button(self.pwindow, text='/', width=5, command=lambda: self.sign_num('/')) self.button_add.grid(row=5, column=1) self.button_equal = Button(self.pwindow, text='=', width=5, command=self.equal_num) self.button_equal.grid(row=5, column=2) # 设置文本显示框 self.text_1 = Text(self.pwindow, width=18, height=3) self.text_1.grid(row=0, column=0, columnspan=3) def show_num(self, num): """显示数字到显示框""" if self.if_equal: self.text_1.delete(1.0, END) self.if_equal = False self.text_1.insert(2.0, num) def sign_num(self, sign): """运算符号""" self.sign = sign self.num1 = self.text_1.get(1.0, END) self.text_1.delete(1.0, END) # 清空显示框 def equal_num(self): """等于号""" self.if_equal = True self.num2 = self.text_1.get(1.0, END) self.text_1.delete(1.0, END) count = 0 if self.sign == '+': count = float(self.num1) + float(self.num2) elif self.sign == '-': count = float(self.num1) - float(self.num2) elif self.sign == '*': count = float(self.num1) * float(self.num2) else: count = float(self.num1) / float(self.num2) self.text_1.insert(1.0, count) if __name__ == '__main__': parent_window = Tk() c = Calculator(parent_window) parent_window.mainloop()

该计算器真的很简易，还有很多可以优化的地方。可以用pyinstaller将它打包成一个exe应用程序。

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