python开发文本文件对比

#coding:utf-8
#！/usr/bin/python
from difflib import *
import sys
import os
reload(sys)
sys.setdefaultencoding( "utf-8" )
from Tkinter import *
import tkFileDialog;
import tkMessageBox;

root=Tk();
root.geometry("280x300+983+630");
root.attributes("-alpha",1)
root.attributes("-topmost",1);
root.title=("Contrast");

filename2 = tkFileDialog.askopenfilename(initialdir = 'C:Python');
label1=Label(root,text=filename2); 
label1.pack();

filename4 = tkFileDialog.askopenfilename(initialdir = 'C:Python');
label2=Label(root,text=filename4); 
label2.pack();

def diffcommand(filename):
    fileHandle = open(filename,"rb")
    text=fileHandle.read().splitlines()
    fileHandle.close()
    return text

def diffbtn():
    if filename2=="" or filename4=="":
        tkMessageBox.showinfo("Sorry","Please select file")
    else:
        text1_lines=diffcommand(filename2)
        text2_lines=diffcommand(filename4)
        s=HtmlDiff.make_file(HtmlDiff(),text1_lines,text2_lines)
        f=open(r"c:对比结果.html",'w')
        f.write(s)
        f.close()

Button(root,text="Contrast",state=ACTIVE,bg="blue",command=diffbtn).pack(side=LEFT)
root.mainloop()