Good Day All.

I am trying to get Notebook to work and the following code return
errors. If I replace f2 with something similar to f1, it works.

Thanks.

Code is:

from tkinter import *
from tkinter import ttk

class ClientNoteBook():
def __init__(self, root):
self.root=root
nb=ttk.Notebook(root)
f1=Frame(nb)
f2=FirstFrame(nb)
nb.add(f1, text='info')
nb.add(f2, text='in')
nb.pack()
def PlaceClientInfo(self):
pass

class FirstFrame():
def __init__(self,root):
self.root=root
self.frame=Frame(self.root)
self.PlaceButtonCheck()
def PlaceButtonCheck(self):
self.btn=ttk.Button(self.root,text='Open
Child',command=self.DebugThis) self.btn.grid(column=0,row=1)
def DebugThis(self):
print('rrrrrr')

if __name__=='__main__':
root = Tk()
root.option_add('*font', ('verdana', 9, 'normal'))
root.title("Information Client")
display = ClientNoteBook(root)
root.mainloop()

Error returned is:

Traceback (most recent call last):
File "/tmp/clientnotebook.py", line 31, in <module>
display = ClientNoteBook(root)
File "/tmp/clientnotebook.py", line 11, in __init__
nb.add(f2, text='in')
File "/usr/lib/python3.2/tkinter/ttk.py", line 865, in add
self.tk.call(self._w, "add", child, *(_format_optdict(kw)))
_tkinter.TclError: bad window path name "<__main__.FirstFrame object at
0x7f556e74dcd0>"