only process one sequence in _set_seqtype()!
only process one sequence in _set_seqtype()!

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