missing import, fixes #114
missing import, fixes #114

sreichholf/python-coherence,ismaelgaudioso/Coherence,opendreambox/python-coherence,unintended/Cohen,coherence-project/Coherence,furbrain/Coherence,sreichholf/python-coherence,unintended/Cohen,furbrain/Coherence,coherence-project/Coherence,ismaelgaudioso/Coherence,opendreambox/python-coherence