Presumably it still supports Python 2.7, so this isn't actually the end of Python 2 support.
But anaconda python will work nicely on centos 6 I suspect.
2.6 was released on 01-Oct-2008 and the last security-fix release was on October 29, 2013.
Humorously, https://www.python.org/download/releases/2.6/ says "Python 2.6 has been replaced by a newer bugfix release of Python. Please download Python 2.6.7 instead."
Following the link to 2.6.7 says "Python 2.6.7 has been replaced by a newer security-fix only source release of Python. Please download Python 2.6.8 instead."
Following the link to 2.6.8 says "Please download Python 2.6.9 instead." Which finally took me to the final release of the 2.6 series.
2.6.6 isn't mentioned at https://www.python.org/download/releases/2.6/ nor in my earlier comment.