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[Python-Dev] cpython: Introduce importlib.util.ModuleManager which is a context manager to

R. David Murray rdmurray at bitdance.com
Wed May 29 18:49:43 CEST 2013 
On Wed, 29 May 2013 12:25:45 -0400, Brett Cannon <brett at python.org> wrote:
> In case you want to suggest a name, the context manager returns the
> module that should be initialized/loaded. So typical usage will be::
> 
>   class Loader:
>     def load_module(self, fullname):
>       with importlib.util.module_to_init(fullname) as module:
>         # Load/initialize the module
>         return module
> 
> Basically the manager either gets the module from sys.modules if it is
> already there (a reload) or creates a new module and sticks it into
> sys.modules so other imports will grab the right module object. If
> there is an exception and the module was new, it deletes it from
> sys.modules to prevent stale modules from sticking around.

So it is a context manager to handle the exception?  Now I think I see
where Nick is coming from.

How about 'managed_initializiation'?  That seems closer to the 'closing'
model, to me.  It isn't as clear about what it is returning, though,
since you are passing it a name and getting back a module, whereas in
the closing case you get back the same object you send in.

Perhaps 'managed_module'?

--David
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