On Mar 28, 2:15 pm, Alan G Isaac <alan.is...@gmail.com> wrote: > I'm a complete newbie to GUI. > I have a couple questions about tkinter. > > 1. Where is the list of changes > in Python 3's tkinter? > > 2. What exactly is the role of the root object, > traditionally created as ``root=tk.Tk()``? > What is an example where one should create this > before creating a Frame instance (which will > otherwise implicitly create one as its master)? > > 2. Suppose I ``import tkinter as tk`` and > then try ``s1=tk.StringVar()``. This fails > because no "master" is set. Why does a > Variable need a master? > > 3. Now suppose I set ``root = tk.TK()`` and > then try ``s1=tk.StringVar()``. This > works fine but now seems a bit magical: > how has the value of the "master" been > set? > > 4. Another bit of magic: > Suppose I ``import tkinter as tk`` and > then try ``f1=tk.Frame()``. This works > fine: apparently calling Frame also > leads to implicit creation of a "master". > Why is what is good for the gander (i.e., > implicit master creation for a Frame) not > good for the goose (i.e., a Variable)? > (Here I assume that there has been an > answer to 2. above.) > > 5. Reading around a bit, > it seems common to recommend setting > the values of Variables rather than initializing > them. Why? I cannot see the reason to avoid > ``s1=tk.StringVar(value="this works fine")`` > and it looks like ``tk.StringVar(()`` is in any > case initialized (to an empty string). > > 6. Why is str(s1) not its value? More generally, > why does a StringVar not behave more like a string? > > Thanks for any insights, > Alan Isaac
Try Google and the Python website. There is tons of info on the Python wiki: http://wiki.python.org/moin/TkInter There are also some books that walk you through Tkinter application creation, for example,Lutz's "Programming Python". - Mike -- http://mail.python.org/mailman/listinfo/python-list