Actually, I don't really understand what problem you're trying to solve here. Are you trying to run with Python 2.6?

The 'backports' did not work..

"from backports import OrderedSet
from backports import Set"

Python 2.7.9 |Anaconda 2.1.0 (64-bit)| (default, Dec 15 2014, 10:33:51)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux2

http://python-future.org/imports.html

Did you try pip install backports ? The backports module should be listed in requirements.txt but it looks like it's missing.

yes i installed backport...the error was that the datastruct of OrderedSet and Set.
It was not a import error.

https://docs.python.org/2/library/sets.html
https://docs.python.org/2/library/collections.html

I think if i use Python2.7.9 the backports are from Python3...
i don't know for which python version the script it was created?

On my computer i can now run the makefile without error and getting results.