Python ImportError cannot import urandom Since Ubuntu 12.04 upgrade

Question

Upgraded Ubuntu to Precise Pangolin (12.04), and Python\'s Random is now broken... I suspect other things might be broken too. How do I fix Python?

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Answer 1

I had the same problem when upgrading to 12.10, and when upgrading to 16.04 (In the 16.04, the message was no module named datetime.)

To solve it just ran virtualenv over the same installation and it worked. Give it the --no-site-packages flag to preserve your modules:

$ virtualenv --no-site-packages ~/lib/virtualenv/netunong
Overwriting /home/adam/lib/virtualenv/netunong/lib/python2.7/site.py with new content
New python executable in /home/adam/lib/virtualenv/netunong/bin/python
Installing distribute............done.
Installing pip................done.
Overwriting /home/adam/lib/virtualenv/netunong/bin/activate with new content
Overwriting /home/adam/lib/virtualenv/netunong/bin/activate_this.py with new content

Since I have all of my virtualenvs in the same dir, I just ran:

$ ls | xargs -I{} virtualenv  --no-site-packages {}