tkinter实现的文本编辑器

效果：

                                                   

# -*- encoding: utf8 -*-
#python 2.7
from Tkinter import *
from tkMessageBox import *
from tkFileDialog import *
import os

filename = ''

def author():
    showinfo('author:','sundy')

def about():
    showinfo('Copyright:','sundy')

def openfile():
    global filename
    filename = askopenfilename(defaultextension = '.txt')
    if filename == '':
        filename = None
    else:
        root.title('FileName:'+os.path.basename(filename))
        textPad.delete(1.0,END)
        f = open(filename,'r')
        textPad.insert(1.0,f.read())
        f.close()

def new():
    global filename
    root.title('未命名文件')
    filename = None
    textPad.delete(1.0,END)

def save():
    global filename
    try:
        f = open(filename,'w')
        msg = textPad.get(1.0,END)
        f.write(msg)
        f.close()
    except:
        saveas()

def saveas():
    f = asksaveasfilename(initialfile= '未命名.txt', defaultextension='.txt')
    global filename
    filename = f
    fh = open(f,'w')
    msg = textPad.get(1.0,END)
    fh.write(msg)
    fh.close()
    root.title('FileName:'+os.path.basename(f))

def cut():
    textPad.event_generate('<<Cut>>')

def copy():
    textPad.event_generate('<<Copy>>')

def paste():
    textPad.event_generate('<<Paste>>')

def redo():
    textPad.event_generate('<<Redo>>')

def undo():
    textPad.event_generate('<<Undo>>')

def selectAll():
    textPad.tag_add('sel','1.0',END)

def search():
    def dosearch():
        myentry = entry1.get()             #获取查找的内容--string型
        whatever = str(textPad.get(1.0,END))
        # print textPad.index('zxc')
        # print myentry
        # print "%d个"%(whatever.count(myentry))    #计算substr在S中出现的次数
        showinfo("查找结果：","you searched %s, there are %d in the text"%(myentry,whatever.count(myentry)))
        # print whatever.find(myentry)

        # teIndex = textPad.index(myentry)
        # textPad.linestart(teIndex)
        # textPad.mark_set('insert', teIndex)
        # textPad.mark_set(myentry,CURRENT + '+5c')
        # textPad.mark_set(myentry,CURRENT + ' wordstart')
    topsearch = Toplevel(root)
    topsearch.geometry('300x30+200+250')
    label1 = Label(topsearch,text='Find')
    label1.grid(row=0, column=0,padx=5)
    entry1 = Entry(topsearch,width=20)
    entry1.grid(row=0, column=1,padx=5)
    button1 = Button(topsearch,text='查找',command=dosearch)
    button1.grid(row=0, column=2)

root = Tk()
root.title('Sundy Node')
root.geometry("800x500+100+100")

#Create Menu
menubar = Menu(root)
root.config(menu = menubar)

filemenu = Menu(menubar)
filemenu.add_command(label='新建', accelerator='Ctrl + N', command= new)
filemenu.add_command(label='打开', accelerator='Ctrl + O',command = openfile)
filemenu.add_command(label='保存', accelerator='Ctrl + S', command=save)
filemenu.add_command(label='另存为', accelerator='Ctrl + Shift + S',command=saveas)
menubar.add_cascade(label='文件',menu=filemenu)

editmenu = Menu(menubar)
editmenu.add_command(label='撤销', accelerator='Ctrl + Z', command=undo)
editmenu.add_command(label='重做', accelerator='Ctrl + y', command=redo)
editmenu.add_separator()
editmenu.add_command(label = "剪切",accelerator = "Ctrl + X",command=cut)
editmenu.add_command(label = "复制",accelerator = "Ctrl + C", command=copy)
editmenu.add_command(label = "粘贴",accelerator = "Ctrl + V", command= paste)
editmenu.add_separator()
editmenu.add_command(label = "查找",accelerator = "Ctrl + F", command=search)
editmenu.add_command(label = "全选",accelerator = "Ctrl + A", command= selectAll)
menubar.add_cascade(label = "操作",menu = editmenu)
aboutmenu = Menu(menubar)
aboutmenu.add_command(label = "作者", command=author)
aboutmenu.add_command(label = "关于", command = about)
menubar.add_cascade(label = "about",menu=aboutmenu)

#toolbar
toolbar = Frame(root, height=25,bg='grey')
shortButton = Button(toolbar, text='打开',command = openfile)
shortButton.pack(side=LEFT, padx=5, pady=5)

shortButton = Button(toolbar, text='保存', command = save)
shortButton.pack(side=LEFT)
toolbar.pack(expand=NO,fill=X)

#Status Bar
status = Label(root, text='Ln20',bd=1, relief=SUNKEN,anchor=W)
status.pack(side=BOTTOM, fill=X)

#linenumber&text
lnlabel =Label(root, width=2, bg='antique white')
lnlabel.pack(side=LEFT, fill=Y)

textPad = Text(root, undo=True)
textPad.pack(expand=YES, fill=BOTH)

scroll = Scrollbar(textPad)
textPad.config(yscrollcommand= scroll.set)
scroll.config(command = textPad.yview)
scroll.pack(side=RIGHT,fill=Y)

root.mainloop()

推荐文档：http://effbot.org/tkinterbook/

*python2.7环境。。在python3.X中tkinter有改变，请注意！！