I would like to upgrade the Python on my SLES 11 from 2.6.9 to 2.7.14 version. The environment isn't prepared for development (make is not installed and zipper cannot help). Could you please recommend a way how to get Python 2.7.14 RPM files for SLES 11.
What you're asking for is a Software Collection. I just checked and their Python 2.7 is still at 2.7.13 at this time, but they have instructions on how to build your own.
Do not change out the default system-level python (as suggested in some comments)! Bad things can happen and things like yum can break.