Python3.7的记事本！快看哪！

记事本代码如下：

#创建一个记事本
#__author__='ZhangP'
#-*- encoding:utf8 -*-

from tkinter import *
import tkinter.messagebox
import tkinter.filedialog
import os


root=Tk()
root.title('记事本')


root.geometry("800x500+100+100")

filename=''

def author():
    
    tkinter.messagebox.askokcancel('作者信息','本软件由tiantian520开发')


def about():
    
    tkinter.messagebox.askokcancel('版权信息.Copyright','随意转载啦!')

#定义文件子菜单对应的相关函数
def openfile():
    global filename
    filename=tkinter.filedialog.askopenfilename(defaultextension = '.txt')

    if filename == '':
        filename=None
    else:
        root.title('FileName:'+os.path.basename(filename))
        textPad.delete(1.0,END)
        f=open(filename,'r',encoding='utf-8')   #注意后面要加上读取的编码格式，否则报编码错误
        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=tkinter.filedialog.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('<>')

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

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

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

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

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

def search():
    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')
    button1.grid(row=0,column=2)


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='撤消',accelerator='Ctrl+z',command=undo)
editmenu.add_command(label='重做',accelerator='Ctrl+y',command=redo)
#添加分割线
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='编辑',menu=editmenu)


aboutmenu=Menu(menubar)
aboutmenu.add_command(label='作者',command=author)
aboutmenu.add_command(label='版权',command=about)
menubar.add_cascade(label='关于',menu=aboutmenu)



toolbar=Frame(root,height=25,bg='light sea green')
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=Label(root,text="Ln20",bd=1,relief=SUNKEN,anchor=W)
status.pack(side=BOTTOM,fill=X)


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()

哈哈，运行即可喽~
快点和别人炫耀自己的记事本吧~