Fix import for playhouse sqlite ext.
Fix import for playhouse sqlite ext.

jarrahwu/peewee,zhang625272514/peewee,coleifer/peewee,d1hotpep/peewee,coleifer/peewee,stas/peewee,jnovinger/peewee,coreos/peewee,new-xiaji/peewee,mackjoner/peewee,softside/peewee,coleifer/peewee,coreos/peewee,teserak/peewee,jarrahwu/peewee,jnovinger/peewee,bopo/peewee,Dipsomaniac/peewee,Sunzhifeng/peewee,bopo/peewee,coreos/peewee,bopo/peewee,new-xiaji/peewee,ronyb29/peewee,wenxer/peewee,Dipsomaniac/peewee,py4a/peewee,fuzeman/peewee,ghukill/peewee,new-xiaji/peewee,Dipsomaniac/peewee,zhang625272514/peewee,d1hotpep/peewee,fuzeman/peewee,wenxer/peewee,Sunzhifeng/peewee,jarrahwu/peewee,zhang625272514/peewee,lez/peewee,Sunzhifeng/peewee