Question: Importing the same module under different names
brueckd at tbye.com
brueckd at tbye.com
Mon Jun 3 15:06:33 EDT 2002
On Mon, 3 Jun 2002, Andreas Jung wrote:
> Usually Python imports a module 'foo' only once when one uses
> multiple 'import foo' statements. However Python load the
> module when one uses packages e.g.
>
> packages/__init.py
> /foo.py
>
>
> When PYTHONPATH is set to the 'packages' directory then
This defeats the purpose of having packages in the first place.
> import foo
> import packages.foo
[snip]
> loads the foo module twice. How does Python determine in this case
> to load the module or not?
IMO, setting the PYTHONPATH to include a subtree of your package directory
is the wrong thing to do. Is there a case when you really need to do this?
It seems akin to:
ln -s foo.py bar.py
and then noticing that
import foo, bar
causes the module to load twice, i.e. it's too much to hope that Python
will figure out your trickery! :-)
-Dave
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