Fix Singleton checks for None.
Fix Singleton checks for None.

kinverarity1/pyexperiment,shaunstanislaus/pyexperiment,DeercoderResearch/pyexperiment,DeercoderResearch/pyexperiment,kinverarity1/pyexperiment,kinverarity1/pyexperiment,duerrp/pyexperiment,duerrp/pyexperiment,shaunstanislaus/pyexperiment,DeercoderResearch/pyexperiment,shaunstanislaus/pyexperiment,shaunstanislaus/pyexperiment,DeercoderResearch/pyexperiment,duerrp/pyexperiment,kinverarity1/pyexperiment