Tkinter一般是python自带的,所以代码不需要其他组件,本程序是在python2.7版本实现的。
主要涉及了tkinter的使用,函数定义和调用,匿名函数的使用,类成员函数定义等python基础知识,适合新手学习。
代码如下:
from Tkinter import * #创建横条型框架 def frame(root, side): w = Frame(root) w.pack(side = side, expand = YES, fill = BOTH) return w #创建按钮 def button(root, side, text, command = None): w = Button(root, text = text, command = command) w.pack(side = side, expand = YES, fill = BOTH) return w #继承了Frame类,初始化程序界面的布局 class Calculator(Frame): def __init__(self): Frame.__init__(self) self.pack(expand = YES, fill = BOTH) self.master.title('Simple Calculater') display = StringVar() #添加输入框 Entry(self, relief = SUNKEN, textvariable = display).pack(side = TOP, expand = YES, fill = BOTH) #添加横条型框架以及里面的按钮 for key in('123', '456', '789', '-0.'): keyF = frame(self, TOP) for char in key: button(keyF, LEFT, char, lambda w = display, c = char:w.set(w.get() + c)) #添加操作符按钮 opsF = frame(self, TOP) for char in '+-*/=': if char == '=': btn = button(opsF, LEFT, char) btn.bind('<ButtonRelease - 1>', lambda e, s = self, w = display:s.calc(w), '+') else: btn = button(opsF, LEFT, char, lambda w = display, s = '%s' %char:w.set(w.get() + s)) #添加清除按钮 clearF = frame(self, BOTTOM) button(clearF, LEFT, 'clear', lambda w = display:w.set('')) #调用eval函数计算表达式的值 def calc(self, display): try: display.set(eval(display.get())) except: display.set("ERROR") #程序的入口 if __name__ == '__main__': print('ok') Calculator().mainloop()实现效果如下图:
基于Tkinter用50行Python代码实现简易计算器,布布扣,bubuko.com
原文地址:http://blog.csdn.net/hewei0241/article/details/31370487