Python 基于TK 文本编辑器

#coding=utf-8
import sys,os
import tkFileDialog
from Tkinter import *
from tkFont import Font


print "欢迎使用编辑器: ", str(sys.argv[0])[:-3]

class Write():

    def __init__(self):
         self.tk=Tk()
         if len(sys.argv[0])>=2:
             fname=self.fname=sys.argv[1]
         else:
             fname=self.fname='new.txt'
         self.createUI(fname)
         self.tk.mainloop()


    def createUI(self,fname):
         #create menu
         menubar=Menu(self.tk,bg='purple')
         fmenu=Menu(menubar,tearoff=0)
         fmenu.add_command(label='Open',command=self.open)
         fmenu.add_command(label='Save',command=self.save)
         fmenu.add_command(label='Exit',command=exit)
         menubar.add_cascade(label="File", menu=fmenu)
         self.tk.title("Welcome to writer!")
         self.tk.geometry("800x600")
         self.tk.config(menu=menubar,background="gray",borderwidth = 8)
         #l =
         self.txt=Text(width=6000,height=6000,font=Font(self.tk,size=14))
         with open(fname) as f:
             content = f.read()
             f.close()
             print content
         filecontent=content
         #self.txt.delete(1.0,END)
         self.txt.insert(INSERT,filecontent)
         self.txt.pack()

    def save(self):
       txtContent = self.txt.get(1.0,END)
       self.saveFile(content=txtContent)


    def open(self):
         self.filename = tkFileDialog.askopenfilename(initialdir = os.getcwd())
         filecontent=self.openFile(fname=self.filename)
         if filecontent is not -1:
              self.text.delete(1.0,END)
              self.text.insert(1.0,filecontent)

    def openFile(self,fname=None):
         if fname is None:
              return -1
         self.fname = fname
         file = open(fname,'r+')
         content = file.read()
         file.close()
         return content

    def saveFile(self,content=None):
         if content is None:
              return -1
         file=open(self.fname,'w')
         file.write(content)
         file.flush()
         file.close()
         return 0

    def exit(self):
         sys.exit(0)

if __name__ == '__main__':
    if len(sys.argv)>=2:
        Write()
    else:
        print "请加上需要编辑的文件名,例:python %s new.txt"%sys.argv[0]