Python version, “2.7.2+”, what does the plus mean?

Question

I have a virtual environment that I installed some time ago. When I activate it and run python I\'m told that the version number is

Python 2.7.2+ (default,          


        

Answer 1

From effbot's guide to the Python version numbering scheme:

You may also find version numbers with a “+” suffix, e.g. “2.2+”. These are unreleased versions, built directly from the subversion trunk. In practice, after a final minor release is made, the subversion trunk is incremented to the next minor version, which becomes the “a0” version, e.g. “2.4a0”.

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And for your second question, the inability to import urandom in a virtualenv is a known problem.

This answer to a similar question should be helpful.