Exclude an unused helper function in Py2.
Exclude an unused helper function in Py2.

scoder/cython,da-woods/cython,cython/cython,da-woods/cython,scoder/cython,da-woods/cython,cython/cython,da-woods/cython,cython/cython,cython/cython,scoder/cython,scoder/cython