fixed additional unpickling problem, issue 54
fixed additional unpickling problem, issue 54

RitwikGupta/pygr,GenDataPro/pygr,cjlee112/pygr,RitwikGupta/pygr,theoryno3/pygr,theoryno3/pygr,RitwikGupta/pygr,theoryno3/pygr,cjlee112/pygr,ctb/pygr,cjlee112/pygr,ctb/pygr,ctb/pygr,GenDataPro/pygr,ctb/pygr,GenDataPro/pygr,ctb/pygr,cjlee112/pygr