python - tk.Panedwindow isn't visible -


i'm learning tk , run problem using panedwindow python. code:

import tkinter tk import tkinter.ttk ttk  class application(tk.frame):     def __init__(self,master):         #set top window geomotry          tk.frame.__init__(self,master)          pane = tk.panedwindow(self)         pane.pack(fill=tk.both, expand=1)           test=tk.label(pane,text='test')         test.pack()  root=tk.tk() root.geometry("800x600") app=application(root) tk.mainloop()

nothing appears in root window.

everything in application visible if instance of application visible. not, because haven't called pack, place, or grid on instance of application (ie: app).

the other problem more of conceptual one. if add paned window have 1 pane, not have divider since there nothing divide.

here working version of code, second pane can more visualize it.

import tkinter tk import tkinter.ttk ttk  class application(tk.frame):     def __init__(self,master):         #set top window geomotry          tk.frame.__init__(self,master)          pane = tk.panedwindow(self)         pane.pack(fill=tk.both, expand=1)          test=tk.label(pane, text='test', background="pink")         pane.add(test)          test2 = tk.label(pane, text="foo", background="blue")         pane.add(test2)  root=tk.tk() root.geometry("800x600") app=application(root) app.pack(fill="both", expand=true) tk.mainloop()

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