一、代码
#coding=utf-8
"""
开发记事本软件的菜单
"""
from tkinter.filedialog import *
from tkinter.colorchooser import *
class Application(Frame):
def __init__(self, master=None):
super().__init__(master) # super()代表的是父类的定义，而不是父类对象
self.master = master
self.textpad = None # textpad表示Text文本框对象
self.pack()
self.createWidget()
def createWidget(self):
# 创建主菜单栏
menubar = Menu(root)
# 创建子菜单
menuFile = Menu(menubar)
menuEdit = Menu(menubar)
menuHelp = Menu(menubar)
# 将子菜单加入到主菜单栏
menubar.add_cascade(label="文件(F)", menu=menuFile)
menubar.add_cascade(label="编辑(E)", menu=menuEdit)
menubar.add_cascade(label="帮助(H)", menu=menuHelp)
# 添加菜单项
menuFile.add_command(label="新建", accelerator="ctrl+n", command=self.newfile)
menuFile.add_command(label="打开", accelerator="ctrl+o", command=self.openfile)
menuFile.add_command(label="保存", accelerator="ctrl+s",command=self.savefile)
menuFile.add_separator() # 添加分割线
menuFile.add_command(label="退出", accelerator="ctrl+q",command=self.exit)
# 将主菜单栏加到根窗口
root["menu"] = menubar
#添加快捷键事件处理
root.bind('<Control-n>', self.newfile)
root.bind('<Control-o>', self.openfile)
root.bind('<Control-s>', self.savefile)
root.bind('<Control-q>', self.exit)
#文本编辑区
self.textpad = Text(root, width=50, height=30)
self.textpad.pack()
# 创建上下菜单
self.contextMenu = Menu(root)
self.contextMenu.add_command(label="背景颜色", command=self.AskColor)
#为右键绑定事件
root.bind("<Button-3>",self.createContextMenu)
def newfile(self,event):
self.textpad.delete(1.0, END)
self.filename=asksaveasfilename(title="新建",initialfile="未命名.txt",
initialdir='F:/Python/mypro_GUI',
filetype=[('文本文档','*.txt')],defaultextension='.txt')
def openfile(self,event):
with askopenfile(title="打开文件",initialdir='F:/Python/mypro_GUI') as f:
self.textpad.insert(INSERT,f.read())
self.filename = f.name
def savefile(self,event):
with open(self.filename,'w') as f:
c = self.textpad.get(1.0,END)
f.write(c)
def exit(self,event):
root.quit()
def AskColor(self):
s1 = askcolor(color="red",title='选择背景色')
self.textpad['bg']=s1[1]
def createContextMenu(self,event):
# 菜单在鼠标右键单击的坐标处显示
self.contextMenu.post(event.x_root, event.y_root)
if __name__ == '__main__':
root = Tk()
root.geometry("450x300+200+300")
root.title("百战程序员的简易记事本")
app = Application(master=root)
root.mainloop()二、问题
老师，为什么我运行生成的.exe文件，点“文件”—“新建”等按钮，都会报上述的错误？
![0D`O[0ZRU_H$WD7AV]FAKQP.jpg](/ueditor/php/upload/image/20200218/1581998389144719.jpg "1581998389144719.jpg")
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