如何用python实现记事本功能

本篇内容介绍了"如何用python实现记事本功能"的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！

1. 案例介绍

tkinter 是 Python下面向 tk 的图形界面接口库，可以方便地进行图形界面设计和交互操作编程。tkinter 的优点是简单易用、与 Python 的结合度好。tkinter 在 Python 3.x 下默认集成，不需要额外的安装操作；不足之处为缺少合适的可视化界面设计工具，需要通过代码来完成窗口设计和元素布局。本例采用的 Python 版本为 3.8，如果想在 python 2.x下使用 tkinter，请先进行安装。需要注意的是，不同 Python 版本下的 tkinter 使用方式可能略有不同，建议采用 Python3.x 版本。本例难度为中级，适合具有 Python 基础和 Tkinter 组件编程知识的用户学习。

2. 示例效果

3. 示例源码

from tkinter import *from tkinter.filedialog import *from tkinter.messagebox import *import os filename = ""  def author():    showinfo(title="作者", message="Python")  def power():    showinfo(title="版权信息", message="课堂练习")  def mynew():    global top, filename, textPad    top.title("未命名文件")    filename = None    textPad.delete(1.0, END)  def myopen():    global filename    filename = askopenfilename(defaultextension=".txt")    if filename == "":        filename = None    else:        top.title("记事本" + os.path.basename(filename))        textPad.delete(1.0, END)        f = open(filename, 'r')        textPad.insert(1.0, f.read())        f.close()  def mysave():    global filename    try:        f = open(filename, 'w')        msg = textPad.get(1.0, 'end')        f.write(msg)        f.close()    except:        mysaveas()  def mysaveas():    global filename    f = asksaveasfilename(initialfile="未命名.txt", defaultextension=".txt")    filename = f    fh = open(f, 'w')    msg = textPad.get(1.0, END)    fh.write(msg)    fh.close()    top.title("记事本 " + os.path.basename(f))  def cut():    global textPad    textPad.event_generate("<>")  def copy():    global textPad    textPad.event_generate("<>")  def paste():    global textPad    textPad.event_generate("<>")  def undo():    global textPad    textPad.event_generate("<>")  def redo():    global textPad    textPad.event_generate("<>")  def select_all():    global textPad    # textPad.event_generate("<>")    textPad.tag_add("sel", "1.0", "end")  def find():    t = Toplevel(top)    t.title("查找")    t.geometry("260x60+200+250")    t.transient(top)    Label(t, text="查找：").grid(row=0, column=0, sticky="e")    v = StringVar()    e = Entry(t, width=20, textvariable=v)    e.grid(row=0, column=1, padx=2, pady=2, sticky="we")    e.focus_set()    c = IntVar()    Checkbutton(t, text="不区分大小写", variable=c).grid(row=1, column=1, sticky='e')    Button(t, text="查找所有", command=lambda: search(v.get(), c.get(),                                                  textPad, t, e)).grid(row=0, column=2, sticky="e" + "w", padx=2,                                                                       pady=2)     def close_search():        textPad.tag_remove("match", "1.0", END)        t.destroy()     t.protocol("WM_DELETE_WINDOW", close_search)  def mypopup(event):    # global editmenu    editmenu.tk_popup(event.x_root, event.y_root)  def search(needle, cssnstv, textPad, t, e):    textPad.tag_remove("match", "1.0", END)    count = 0    if needle:        pos = "1.0"        while True:            pos = textPad.search(needle, pos, nocase=cssnstv, stopindex=END)            if not pos:                break            lastpos = pos + str(len(needle))            textPad.tag_add("match", pos, lastpos)            count += 1            pos = lastpos        textPad.tag_config('match', fg='yellow', bg="green")        e.focus_set()        t.title(str(count) + "个被匹配")  top = Tk()top.title("记事本")top.geometry("600x400+100+50") menubar = Menu(top) # 文件功能filemenu = Menu(top)filemenu.add_command(label="新建", accelerator="Ctrl+N", command=mynew)filemenu.add_command(label="打开", accelerator="Ctrl+O", command=myopen)filemenu.add_command(label="保存", accelerator="Ctrl+S", command=mysave)filemenu.add_command(label="另存为", accelerator="Ctrl+shift+s", command=mysaveas)menubar.add_cascade(label="文件", menu=filemenu) # 编辑功能editmenu = Menu(top)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=find)editmenu.add_command(label="全选", accelerator="Ctrl+A", command=select_all)menubar.add_cascade(label="编辑", menu=editmenu) # 关于 功能aboutmenu = Menu(top)aboutmenu.add_command(label="作者", command=author)aboutmenu.add_command(label="版权", command=power)menubar.add_cascade(label="关于", menu=aboutmenu) top['menu'] = menubar # shortcutbar = Frame(top, height=25, bg='light sea green')# shortcutbar.pack(expand=NO, fill=X)# Inlabe = Label(top, width=2, bg='antique white')# Inlabe.pack(side=LEFT, anchor='nw', fill=Y) textPad = Text(top, 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) # 热键绑定textPad.bind("", mynew)textPad.bind("", mynew)textPad.bind("", myopen)textPad.bind("", myopen)textPad.bind("", mysave)textPad.bind("", mysave)textPad.bind("", select_all)textPad.bind("", select_all)textPad.bind("", find)textPad.bind("", find) textPad.bind("", mypopup)top.mainloop()

"如何用python实现记事本功能"的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注网站，小编将为大家输出更多高质量的实用文章！