python 的 Tkinter实现一个简易计算器详解编程语言

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()