import hooks (PEP 302) broken in Python >=2.5?

[Josh Haberman]

When reading about import hooks, I came across a blog entry comment
that says:

One additional thing to note about ihooks is that it's
somewhat seriously broken on Python 2.5 and newer and there
seems to be little or no interest in fixing it. It's
probably worth *always* avoiding when writing new code.

--http://orestis.gr/blog/2008/12/20/python-import-hooks/#c264

Does anyone know what this is referring to? Should I be wary of
relying on import hooks?

Josh

 

[Steven D'Aprano]

When reading about import hooks, I came across a blog entry comment
that says:

One additional thing to note about ihooks is that it's
somewhat seriously broken on Python 2.5 and newer and there
seems to be little or no interest in fixing it. It's
probably worth *always* avoiding when writing new code.

--http://orestis.gr/blog/2008/12/20/python-import-hooks/#c264

Does anyone know what this is referring to? Should I be wary of
relying on import hooks?

Are you using import hooks? What version(s) of Python are you using?

Depending on whether you are asking out of curiosity, or because you have
code that uses import hooks and you're about to migrate from Python 2.3 to
3.1, the answers may be different.

 

[Ryan Kelly]

When reading about import hooks, I came across a blog entry comment
that says:

One additional thing to note about ihooks is that it's
somewhat seriously broken on Python 2.5 and newer and there
seems to be little or no interest in fixing it. It's
probably worth *always* avoiding when writing new code.

--http://orestis.gr/blog/2008/12/20/python-import-hooks/#c264

Does anyone know what this is referring to? Should I be wary of
relying on import hooks?

I believe that comment is referring specifically to "ihooks" the stdlib
module, not "import hooks" the general concept as defined in PEP302.
The former pre-dates the later.

I use custom PEP302 loaders all the time and they work fine in at least
2.6, 2.7 and 3.2.


Ryan

--
Ryan Kelly
http://www.rfk.id.au | This message is digitally signed. Please visit
(e-mail address removed) | http://www.rfk.id.au/ramblings/gpg/ for details


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