本文实例介绍了基于python的Tkinter实现简易计算器的详细代码,分享给大家供大家参考,具体内容如下
第一种:使用python 的 Tkinter实现一个简易计算器
#coding:utf-8 from Tkinter import * import time root = Tk() def cacl(input_str): if \"x\" in input_str: ret = input_str.split(\"x\") return int(ret[0]) * int(ret[1]) def callback(n): print n def callback1(n): print n class App: def __init__(self, master): frame1 = Frame(master) frame1.pack() frame = Frame(master) frame.pack() Button(frame, text=\"1\",command=lambda: callback(1) ).grid(row=0,column=0) Button(frame, text=\"2\",command=lambda: callback(2) ).grid(row=0,column=1) Button(frame, text=\"3\",command=lambda: callback(3) ).grid(row=0,column=2) Button(frame, text=\"4\",command=lambda: callback(4) ).grid(row=1,column=0) Button(frame, text=\"5\",command=lambda: callback(5) ).grid(row=1,column=1) Button(frame, text=\"6\",command=lambda: callback(6) ).grid(row=1,column=2) Button(frame, text=\"7\",command=lambda: callback(7) ).grid(row=2,column=0) Button(frame, text=\"8\",command=lambda: callback(8) ).grid(row=2,column=1) Button(frame, text=\"9\",command=lambda: callback(9) ).grid(row=2,column=2) Button(frame, text=\"0\",command=lambda: callback(0) ).grid(row=3,column=0) Button(frame, text=\"+\",command=lambda: callback1(\"+\") ).grid(row=3,column=1) Button(frame, text=\"-\",command=lambda: callback1(\"-\") ).grid(row=3,column=2) Button(frame, text=\"*\",command=lambda: callback1(\"*\") ).grid(row=4,column=1) Button(frame, text=\"/\",command=lambda: callback1(\"/\") ).grid(row=4,column=2) Button(frame, text=\"=\", command=self.say_hi).grid(row=4,column=0) w = Label(frame1,text=\"输入结果\") w.pack() self.e = Entry(frame1) self.e.pack(padx=5) w1 = Label(frame1,text=\"计算结果\") w1.pack() v = StringVar() e1 = Entry(frame1, textvariable=v) v.set(\"\") self.v = v e1.pack() def say_hi(self): print \"hi there, everyone!\",self.e.get() input_str = self.e.get() self.v.set(cacl(input_str)) app = App(root) root.mainloop()
第二种:基于Tkinter用50行Python代码实现简易计算器
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(\'\', 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:
以上就是本文的全部内容,希望对大家的学习Python程序设计有所帮助。