When NASA first started to evaluate building its Nebula cloud compute project, it evaluated dozens of languages, eventually settling on Python 2.6. In 2010, NASA joined with Rackspace to create the OpenStack project, with Nebula becoming the Nova compute project.
For most the last seven years, Python 2 has remained the cornerstone of OpenStack, even as the Python language moved on to version 3 and newer, safer programming languages have emerged.
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