On 07/03/2016 15:54, Tony van der Hoff wrote: > 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? >
What you're seeing is that "messagebox" is a module inside the "tkinter" package. And modules are not automatically made available under their parent packages. That is: a module's attributes are part of its namespace; but a package's modules aren't part of its. TJG -- https://mail.python.org/mailman/listinfo/python-list
