[Python-Dev] PEP 328 - Relative Imports (original) (raw)
M.-A. Lemburg mal at egenix.com
Wed Sep 8 16:47:35 CEST 2004
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Hi there,
I know that this has been discussed a few times in the past, but the more I have to deal with building applications using third-party libs or packages, the more I get the feeling that the choice of making "import module" absolute is the wrong path to follow.
The typical scenario goes like this:
you build an application that uses various third-party packages and has to maintain them inside another package, e.g. ThirdPartyCode
you don't have access to the (third-party) package source code or it's not feasable to make changes to it for maintenance reasons
Another common case is that you have to deal with third-party code that is not properly packaged as Python package, but comes as a set of top-level modules.
In this scenario you typically put all those files into a newly created Python package directory and access the modules in that directory using the package name.
In Python 2.3 and 2.4 (as well as all previous versions), both scenarios can easily be implemented without having to change the third-party code.
The PEP however suggests that starting with 2.5, the interpreter will issue a warning and 2.6 should default to absolute paths.
I'd like to request that the latter change be postponed to Python 3k, or that some other way of supporting the above scenarios is provided that can be enabled in the application.
Please remember that changes to application code are well possible. What's not possible is making changes to the packaged third-party code.
Thanks,
Marc-Andre Lemburg eGenix.com
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