Comment 10 for bug 954595

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Bruce Wang (number5) wrote :

I got the same error in my virtualenv when I upgraded from 11.10 to 12.04

Turned out to be the python2.7-minimal didn't get properly upgrade, so /usr/bin/python is 2.7.3, but /usr/bin/python2.7 is 2.7.2

`aptitude reinstall python2.7-minimal` then recreate the virtualenv fixed the problem.