Upgrading Python from 2.4 to 2.6 - can I just copy site-packages folder?

[Nick]

Hi,

I'm currently running Django on CentOS using the supplied Python 2.4.
I now need to use Python 2.6. I have installed Python 2.6 from the
EPEL repositories, which sits alongside 2.4 (which is required for
CentOS things such as "yum").

Django (and other Python modules) are all located in Python 2.4's site-
packages folder. When I upgrade to 2.6, is it just a case of copying
these over into 2.6's site-packages folder, or do I need to install
the modules afresh?

Thanks,
Nick

[backdoc]

I haven't tried it. But, I wouldn't think so. It shouldn't be hard
to install Django for 2.6. I've never used CentOS. But, most of the
time, a version requirement means "at least". Of course, in the case
of Python 3, that would not be true.

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[Alex Robbins]

You don't want to just copy site-packages. If you have any compiled
modules (pyyaml, PIL, etc) they won't work, since they were compiled
for the old version of python.

Alex

[Bill Freeman]

Additionally, the .pyc files are version specific. IF you had no specific
incompatibilities, you could consider deleting all .pyc files in the copy,
then import every .py file running as root, to make new .pyc files.

But then there are likely to be plenty of other issues anyway, as Alex
points out.

This is all much more work than just installing stuff fresh, in these bold
new days of distribute and pip install.

Bill

[Alex Robbins]

you could do a pip freeze in your old install, then do a pip install
-r requirements in the new one. That would probably catch most things.

Alex

[Nick]

Many thanks for your helpful posts - in the end I just changed a bit
of my code to work with 2.4, but this will come in handy for when I
finally make the upgrade.

Thanks again,
Nick