Import Error in zope.interface.registry in python

Question

I am installing a project in virtual environment. I am getting error ``` from zope.interface.registry import Components Traceback (most recent call last): File "", line 1, in ImportError: No module named registry ``` Version of this module as 4.0.5 ``` >>> import pkg_resources >>> pkg_resources.get_distribution("zope.interface").version '4.0.5' ``` I tried the same on my machine (not virtual env), ``` >>> import pkg_resources >>> pkg_resources.get_distribution("zope.interface").version '4.0.1' >>> from zope.interface.registry import Components ``` Here `from zope.interface.registry import Components` didn't give any error. According to this ``` QUOTE: 3.8.0 (2011-09-22) New module zope.interface.registry. This is code moved from zope.component.registry which implements a basic nonperistent component registry as zope.interface.registry.Components. ``` , it should not give any error. Any suggestion what I'm missing here or how to solve this error ?

Accepted Answer

I had similar error - I tryed to create new virtual env without site-packages. It creates all fine. But my ubuntu has already installed `zope.interface` for own use, so it did not want to install it additional to my venv.

This collision cause my venv to throw error in simple test app under mod_wsgi:

```
     from zope.interface.registry import Components
ImportError: No module named registry
```

So I trying to remove `zope.interface` from base python. But unistall command not removed it(i found in google, that it is known problem).

Than i found solution: I just switched to my venv and give command for "upgrading" `zope.interface` from there:

```
(env)user@ubuntu:~/env$ sudo pip install --upgrade zope.interface
```

After this my problem with `zope.interface` dissmiss.

Your problem is similar, so my solution could help. Anyway this answer is very useful for ubuntu desktop users.

Import Error in zope.interface.registry in python

Solution

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