python - Filedialogue error in Tkinter -

question tkinter :

i want create browse along text display display file pick browse button. following code :

edit 1.

button_opt = {'fill': tkconstants.both, 'padx': 5, 'pady': 5}     tkinter.button(self, text='browse , open filename - manually upload it', command=self.askopenfilename).pack(**button_opt)      self.file_opt = options = {}             options['defaultextension'] = '.txt'     options['filetypes'] = [('all files', '.*'), ('text files', '.txt')]         options['initialdir'] = 'c:\\'     options['initialfile'] = 'myfile.txt'         options['parent'] = root         options['title'] = 'browse'      self.dir_opt = options = {}     options['initialdir'] = 'c:\\'     options['mustexist'] = false     options['parent'] = root     options['title'] = 'browse'      image = image.open("/home/kuber/downloads/godata/images/header.png")     photo = imagetk.photoimage(image)     label = label(image=photo)     label.image = photo # keep reference!     label.place(width=768, height=576)     label.pack(side = top)      self.centerwindow()     self.master.columnconfigure(10, weight=1)     #tkinter.button(self, text='upload file', command=self.fname).pack(**button_opt)         self.file_name = text(self, width=39, height=1, wrap=word)    def fname(self):     self.file_name = text(self, width=39, height=1, wrap=word)         self.file_name.grid(row=1, column=1, columnspan=4, sticky=w)    def askopenfilename(self):       # filename      filename = tkfiledialog.askopenfilename(**self.file_opt)     # open file on own      if filename:      open(self.filename, 'r') inp_file:         print "1"         self.file_name.delete(0.0, end)         self.file_name.insert(0.0, inp_file.read())             #return open(filename, 'r') 

as press button browse , open file. expect go askopenfilename function text widget. error :

attributeerror: tkfiledialogexample instance has no attribute 'filename'

also when include self.file_name.grid(row=1, column=1, columnspan=4, sticky=w) outside fname, tkinter hangs. pointers ?

when see python error `x instance has no attribute 'filename', means says. root cause 1 of 2 things:

• x object intended use, , indeed not have attributev(maybe misspelled it, o forgot define it), or
• you told program use x, x not think s (ie: think refers object of particular type it's string or number or other class.

so, ask yourself, "why doesn't tkfiledialogexample have attribute? did define have attribute? , when? did misspell it? or, code supposed attribute other object?

in other words, code using self.filename: self think is?