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From: Tony van der Hoff <tony@vanderhoff.org>
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Subject: importing
Date: Mon, 7 Mar 2016 15:54:51 +0000
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I thought I understood this, but apparently not:
Under py3:

1. "import tkinter" imports the whole module into the name space. Any 
access to names therein must be prefixed with the module name.
ie top = tkinter.Tk()
But tkinter.messagebox.showwarning()  errors with "module has no 
attribute 'messagebox'"

2. "from tkinter import *" loads the name space from the module into the 
program name space. No need to prefix the module name onto the attribute 
name. Pollutes the name space, but makes typing easier.
ie top = Tk()
But messagebox.showwarning() still errors.

3. in either of the above cases, if I add "from tkinter import 
messagebox, the attribute resolves correctly.

I imagined that the "*" form implied "load the lot". Evidently, my 
understanding is lacking. Will somebody please put me straight, or give 
me a reference to some definitive documentation?

-- 
Tony van der Hoff        | mailto:tony@vanderhoff.org
Buckinghamshire, England |