how to import a module for global use in a library package ?

[Auré Gourrier]

Dear all,

I am building a library package of the form:

rootlib
---__init__
---subpackage1
------__init__
------sub1module1
------sub1module2
------...
---subpackage2
------ __init__
------sub2module1
------sub2module2
------...

My rootlib.__init__ file contains:

__name__        = ...
__version__     = ...
__author__      = ...
__author_email__= ...
__url__         = ...
__description__ = ...
 
import subpackage1
import subpackage2

__all__ = []
__all__.extend(['subpackage1','subpackage2'])

My question is the following: I need to import an external package, say numpy, for use in various submodules. So far, I simply do an import numpy as _numpy where needed, say sub1module1 and sub2module2. This means that I import this package a number of times which doesn't seem to be a logical thing to do (?).  In the end, I would like to make this module a "global" module for my library.

I would find it more practical to simply do this import in the __init__ of rootlib and then use it directly in the submodules as rootlib._numpy calls, but I'm not sure exactly how to do this because it would mean that I would have to do an import rootlib in my subpackages which doesn't sound so good...

Can anyone give me a hint ?

Cheers,

Auré


      
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