better exception catch
better exception catch

wujuguang/sqlalchemy,davidfraser/sqlalchemy,alex/sqlalchemy,epa/sqlalchemy,wujuguang/sqlalchemy,bootandy/sqlalchemy,ThiefMaster/sqlalchemy,itkovian/sqlalchemy,davidjb/sqlalchemy,robin900/sqlalchemy,EvaSDK/sqlalchemy,ThiefMaster/sqlalchemy,davidjb/sqlalchemy,wfxiang08/sqlalchemy,brianv0/sqlalchemy,inspirehep/sqlalchemy,sqlalchemy/sqlalchemy,olemis/sqlalchemy,Cito/sqlalchemy,dstufft/sqlalchemy,epa/sqlalchemy,robin900/sqlalchemy,elelianghh/sqlalchemy,dstufft/sqlalchemy,elelianghh/sqlalchemy,monetate/sqlalchemy,alex/sqlalchemy,EvaSDK/sqlalchemy,Akrog/sqlalchemy,sandan/sqlalchemy,alex/sqlalchemy,276361270/sqlalchemy,graingert/sqlalchemy,j5int/sqlalchemy,brianv0/sqlalchemy,Cito/sqlalchemy,pdufour/sqlalchemy,bdupharm/sqlalchemy,itkovian/sqlalchemy,j5int/sqlalchemy,graingert/sqlalchemy,davidfraser/sqlalchemy,wfxiang08/sqlalchemy,WinterNis/sqlalchemy,Cito/sqlalchemy,hsum/sqlalchemy,olemis/sqlalchemy,monetate/sqlalchemy,inspirehep/sqlalchemy,halfcrazy/sqlalchemy,bdupharm/sqlalchemy,Akrog/sqlalchemy,hsum/sqlalchemy,bootandy/sqlalchemy,zzzeek/sqlalchemy,276361270/sqlalchemy,sandan/sqlalchemy,WinterNis/sqlalchemy,halfcrazy/sqlalchemy,pdufour/sqlalchemy