This is fairly academic, since I do not anticipate needing to do this myself, but I have a specific question.  I'll assume that Python 3.5.2 will go back to the 2.6-3.4 behavior in which os.urandom() never blocks on Linux.  Moreover, I understand that the case where the insecure bits might be returned are limited to Python scripts that run on system initialization on Linux.

If I *were* someone who needed to write a Linux system initialization script using Python 3.5.2, what would the code look like.  I think for this use case, requiring something with a little bit of "code smell" is fine, but I kinda hope it exists at all.


--
Keeping medicines from the bloodstreams of the sick; food
from the bellies of the hungry; books from the hands of the
uneducated; technology from the underdeveloped; and putting
advocates of freedom in prisons.  Intellectual property is
to the 21st century what the slave trade was to the 16th.