wxPython frame

[Austin]

In tkinter, the dialogs  has the function grab_set(). That means disable
other windows while it's open.
Is there any function like that in wxPython. I want to use it on my frame.
For example, a.py is main frame. There is a button "config" to open
b.py(config frame).
If the function exists in wxPython, i could put that in b.py when b.py is
open and we couldn't
click a.py. Or any other ways to avoid click a.py when b.py is open.

Thanks a lot.