Import Cython in "build_ext" only if it's actually needed, i.e. if any Cython implemented extension modules were found.
Import Cython in "build_ext" only if it's actually needed, i.e. if any Cython implemented extension modules were found.

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