[Tutor] Name spaces again

[David Driver]

I have read the essay at
<http://www.python.org/doc/essays/packages.html> and I am still having
problems understanding what I need to do. Here is the structure that I
am looking at:

Root folder
	StartHere.py
	Common folder
		__init__.py
		sobj.py
		exceptions.py
		validators.py
		View folder (keeps cheetah and sxl templates)
		Search folder (will be namespace for lookup operations)
		Maintain folder (for creating and altering base domain objects)
		Transact folder (namespace for creating transaction operations)
	AR folder
		__init__.py
		sobj.py
		exceptions.py
		validators.py
		View folder 
		Search folder 
		Maintain folder
		Transact folder
	AP folder
		__init__.py
		sobj.py
		exceptions.py
		validators.py
		View folder 
		Search folder 
		Maintain folder
		Transact folder
	GL folder
		__init__.py
		sobj.py
		exceptions.py
		validators.py
		View folder 
		Search folder 
		Maintain folder
		Transact folder

StartHere.py contains:
	import Common
	import AR
	import AP

Each subpackage __init__.py contains:
	import exceptions
	import validators
	import sobjs
	import Maintain
	import Transact
	import Search
	import View


In AR.sobjs I have a class that is inherited from
Common.sobjs.baseDomObj. When I run StartHere.py Common imports just
fine. It starts to import AR and AR. __init__.py imports AR.sobjs.py
and it throws the following error:

Traceback (most recent call last):
  File "C:\foo\doinit\starthere.py", line 3, in ?
    import AR
  File "C:\foo\doinit\AR\__init__.py", line 3, in ?
    import sobjs
  File "C:\foo\doinit\AR\sobjs.py", line 1, in ?
    class custAddress(Common.address):
NameError: name 'Common' is not defined

Do I need to import Common in each sub package to have access to it?
Does it consume more memory? What about Sub Sub packages? shouldn't
you be able to Import DateTime in StartHere and have all sub
modules/packages that are imported into StartHere.py use it? Am I
making a big deal out of nothing?

This entire project is more or less of a mock up of a project. I am
just trying to learn more about python and I am basing it on the VB
based accounting package I currently maintain. It isn't that I would
normally organize an app this way if I were building a new one.

-- 

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See there, that wasn't so bad.
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