handling modules in packages

[Daniel Larsson]

On 9/5/07, Tommy Grav <tgrav at mac.com> wrote:
>
> >>
> > The simplest thing to do would be to have PyAstro.__init__.py
> > import all
> > the sub-modules, and define __all__ as the set of names that the
> > package
> > should inject into importing modules.
> >
> > Then you could write (for example)
> >
> > from PyAstro import numpy, constants, conversion, obsrvations
> >
> > However if you are simply worried about run-time efficiency then don't
> > be: once a module is imported further imports essentially reduce to
> > checking that the module is already present in the sys.modules
> > dict, and
> > so take almost no time at all.
>
> So am I understanding it right that a second import numpy statement
> in a different module (and thus a different namespace) just results in
> a binding to the already existing numpy "object"?


Yes, correct
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