It seems you managed to break your python installation. pyclean is provided by python-minimal - you could try re-installing it.
** Changed in: python-crypto (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767535 Title: package python-crypto 2.6.1-4build1 failed to install/upgrade: subprocess new pre-removal script returned error exit status 126 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-crypto/+bug/1767535/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs