Ubuntu 11.04: VirtualEnvironment - start ipython error after update at 3.10.2012

[Djien Kwee]

Environment: Ubuntu 11.04

At 3.10.2012 there are 5 updates for python 2.7.1 (2.7.1-5ubuntu2, 2.7.1-5ubuntu2.2) and since then ipython in virtual environment produces import error: cannot import name urandom

(virtenv)[/media/wd40/VirtEnv_py2.7_Ubu/virtenv]:$ ipython
Traceback (most recent call last):
  File "/media/wd40/VirtEnv_py2.7_Ubu/virtenv/bin/ipython", line 8, in <module>
    load_entry_point('ipython==0.11', 'console_scripts', 'ipython')()
  File "/media/wd40/VirtEnv_py2.7_Ubu/virtenv/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 318, in load_entry_point
  File "/media/wd40/VirtEnv_py2.7_Ubu/virtenv/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 2221, in load_entry_point
  File "/media/wd40/VirtEnv_py2.7_Ubu/virtenv/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 1954, in load
  File "/media/wd40/VirtEnv_py2.7_Ubu/virtenv/local/lib/python2.7/site-packages/ipython-0.11-py2.7.egg/IPython/__init__.py", line 43, in <module>
    from .config.loader import Config
  File "/media/wd40/VirtEnv_py2.7_Ubu/virtenv/local/lib/python2.7/site-packages/ipython-0.11-py2.7.egg/IPython/config/loader.py", line 26, in <module>
    from IPython.utils.path import filefind, get_ipython_dir
  File "/media/wd40/VirtEnv_py2.7_Ubu/virtenv/local/lib/python2.7/site-packages/ipython-0.11-py2.7.egg/IPython/utils/path.py", line 22, in <module>
    from IPython.utils import warn
  File "/media/wd40/VirtEnv_py2.7_Ubu/virtenv/local/lib/python2.7/site-packages/ipython-0.11-py2.7.egg/IPython/utils/warn.py", line 19, in <module>
    from IPython.utils import io
  File "/media/wd40/VirtEnv_py2.7_Ubu/virtenv/local/lib/python2.7/site-packages/ipython-0.11-py2.7.egg/IPython/utils/io.py", line 18, in <module>
    import tempfile
  File "/usr/lib/python2.7/tempfile.py", line 34, in <module>
    from random import Random as _Random
  File "/usr/lib/python2.7/random.py", line 47, in <module>
    from os import urandom as _urandom
ImportError: cannot import name urandom

No error in non-virtual environment
[~]:$ ipython
Python 2.7.1+ (r271:86832, Sep 27 2012, 21:16:52)
Type "copyright", "credits" or "license" for more information.

IPython 0.10.1 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.

In [1]:
Do you really want to exit ([y]/n)? y
[~]:$

[nator (homebrewer-gmail)]

This just bit me as well. It's this bug: https://bugs.launchpad.net/ubuntu/+source/python-defaults/+bug/989856

Reinstalling the virtual environment over the old one seems to work fine, just run the same command you used to build it the first time.

[Paul Tagliamonte (paultag)]

Bit my co-worker as well. Caused a bit of a frenzy

Marking invalid, but really really really annoying.

[Djien Kwee (djienaijkwee)]

Thank you, reinstall the virtual environment over the existent one, works fine. Ipython can be used again without error