paste.script import error with Python 2.5

[Lorenzo Gil Sanchez]

I'm using Python 2.5.1 with virtualenv. After creating a project with zopeproject I tried to start the server with:

bin/paster serve deploy.ini

but got an ImportError:

Traceback (most recent call last):
  File "bin/paster", line 105, in <module>
    import paste.script.command
ImportError: No module named script.command

So I tried to manually import paste.script with no luck:

(myenv)[lgs@alh022 PasteScript-1.6.3-py2.5.egg]$ pwd
/home/lgs/proyectos/myenv/lib/python2.5/site-packages/PasteScript-1.6.3-py2.5.egg

(myenv)[lgs@alh022 PasteScript-1.6.3-py2.5.egg]$ python -c "import paste.script"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named script

[Lorenzo Gil Sanchez (lgs)]

Further investigation tell me some relevant facts:

- Fedora 9 (my system) install python-paste rpm by default (it's a dependency for smolt)
- It does not install python-paste-deploy neither python-paste-script
- The python-paste rpm install PythonPaste as an old-school site-packages directory, not as an egg

So, in order to fix my problem I had to either:

A) yum install python-paste-deploy python-paste-script

or

B) yum remove python-paste-deploy

The real question is why the scripts living in the bin directory of my zopeproject that were created by buildout are not using Paste, PasteScript and PasteDeploy from my eggs-directory instead of the system site-packages??

Some more information that may help:

(genilenv)[lgs@alh022 demo]$ bin/python

>>> import sys
>>> from pprint import pprint
>>> pprint(sys.path)
['/home/lgs/proyectos/genil/demo/src',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.app.apidoc-3.4.3-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.app.securitypolicy-3.4.6-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/z3c.evalexception-2.0-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/Paste-1.7.1-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/PasteScript-1.6.3-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/PasteDeploy-1.3.2-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.security-3.5.1-py2.5-linux-i686.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.securitypolicy-3.4.1-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.schema-3.4.0-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.location-3.4.0-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.interface-3.4.1-py2.5-linux-i686.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.i18nmessageid-3.4.3-py2.5-linux-i686.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.i18n-3.4.0-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.exceptions-3.5.2-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.configuration-3.4.0-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.component-3.4.0-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.app.security-3.5.1-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.app.form-3.5.0-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.annotation-3.4.0-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.traversing-3.5.0a3-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.testing-3.5.1-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.testbrowser-3.5.0-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.publisher-3.5.3-py2.5.egg',
 '/home/lgs/proyectos/genilenv/lib/python2.5/site-packages/zope.proxy-3.4.1-py2.5-linux-i686....

[Philipp von Weitershausen (philikon)]

El 7 Jul 2008, a las 12:33 , Lorenzo Gil Sanchez escribió:
> Further investigation tell me some relevant facts:
>
> - Fedora 9 (my system) install python-paste rpm by default (it's a
> dependency for smolt)
> - It does not install python-paste-deploy neither python-paste-script
> - The python-paste rpm install PythonPaste as an old-school site-
> packages directory, not as an egg
>
> So, in order to fix my problem I had to either:
>
> A) yum install python-paste-deploy python-paste-script
>
> or
>
> B) yum remove python-paste-deploy
>
> The real question is why the scripts living in the bin directory of my
> zopeproject that were created by buildout are not using Paste,
> PasteScript and PasteDeploy from my eggs-directory instead of the
> system
> site-packages??

That's a good question.

> I wish virtualenv/buildout/zopeproject would *really* isolate us from
> the evil system Python...

At least virtualenv can do that, you need to explicitly tell it to do
so:

   virtualenv --no-site-packages

I wish zc.buildout had a similar option, though, so that there'd be no
need for virtualenv.

[Lorenzo Gil Sanchez (lgs)]

Right, I didn't use --no-site-packages.

I guess that explain my mess and makes this bug as a 'works-for-me' :-)