import X between submodules in a package

[Bruno Desthuilliers]

Donn Ingle a écrit :
>> would be a VeryBadThing(tm). 
> :)
> 
>> Having explicits imports in each module is good wrt/ readability. 
> Okay, I can accept that. I worry that it's opening the module file over and
> over again 

Hopefully not ! "import" is not "include".

> - or does it open it once and kind of re-point to it when it
> hits a second import of the same thing?

You guess. When fisrt imported, the module's source is executed, a 
module object is created and stored in sys.modules, and the needed names 
are inserted into the importing module's namespace. Next times the 
module is "served" directly from sys.modules.

> 
>> package, you can of course factor them out in a distinct submodule and
>> just do a 'from myimports import *' at the top of the others submodules...
> Good point.

Note that while it's perfectly legal, that's a pattern I'd try to avoid 
unless I have a very good reason to use it.