Altering imported modules

[Tro]

On Monday 03 March 2008, castironpi at gmail.com wrote:
> On Mar 3, 5:09 pm, Tro <trowo... at gmail.com> wrote:
> > On Sunday 02 March 2008, Paul McGuire wrote:
> > > On Mar 2, 3:48 pm, Tro <trowo... at gmail.com> wrote:
> > > > On Sunday 02 March 2008, Terry Reedy wrote:
> > > > > "Tro" <trowo... at gmail.com> wrote in message
> > > > >news:200803011856.27611.troworld at gmail.com...
> > > > >
> > > > > | Hi, list.
> > > > > |
> > > > > | I've got a simple asyncore-based server. However, I've modified
> > > > > | the
> > > > >
> > > > > asyncore
> > > > >
> > > > > | module to allow me to watch functions as well as sockets. The
> > > > > | modified asyncore module is in a specific location in my project
> > > > > | and is imported
> > > > >
> > > > > as
> > > > >
> > > > > | usual from my classes.
> > > > > |
> > > > > | Now I'd like to use the tlslite library, which includes an
> > > > > | asyncore mixin class. However, tlslite imports "asyncore", which
> > > > > | doesn't include my own modifications.
> > > > > |
> > > > > | I'd like to know if it's possible to make tlslite load *my*
> > > > > | asyncore
> > > > >
> > > > > module
> > > > >
> > > > > | without changing any of the tlslite code.
> > > > >
> > > > > If your module is also 'asyncore' and comes earlier in the search
> > > > > path, I would expect the import to get yours.
> > > >
> > > > It's not. It has a package prefix like my.package.asyncore. I think I
> > > > can either move my version of asyncore up a couple of levels or add
> > > > the my.package directory to sys.path.
> > > >
> > > > My version of asyncore imports several functions from the built-in
> > > > asyncore. Now that my version of it is imported as asyncore, how
> > > > would it import the built-in version from python2.5/site-packages?
> > > >
> > > > Thanks,
> > > > Tro
> > >
> > > What happens if you do "import my.package.asyncore as asyncore"?
> > >
> > > If that doesn't work (trying the simplest hack first), I know that
> > > there are various hooks in the import mechanism that should help.
> >
> > In the classes that use my version of asyncore currently, that is how I
> > do it. I import my version as "import my.package.asyncore as asyncore".
> > In my asyncore module I do "import asyncore", because I override a few
> > functions from the asyncore module included with python. However, if I
> > were to add "my.package" to sys.path, then I wouldn't be able to "import
> > asyncore" from my own asyncore module. I'd have to do some trickery with
> > sys.path to take the "my.package" component out, import standard
> > asyncore, readd the "my.package" component, so that other modules can
> > "import asyncore" and get my version.
> >
> > Is there a way to import the standard python asyncore module in this
> > scenario?
> >
> > Thanks,
> > Tro
> >
> > 
>
> Are you trying to interfere with the default module on only your
> machine?  Just rename it.  If something in the std. lib. imports
> asyncore, they get yours too that way.

No, I'd like it to be a generalized solution and only for this one project. 
I'm trying to get it to work on any recent python installation out of the 
box, so I can't rename built-in modules. What I'm trying to do is allow a 3rd 
party module (tlslite) to import *my* version of asyncore without me going 
into tlslite's code and changing its import statement explicitly, but only 
for the scope of this one project.

Thanks,
Tro