code: def deleteSNPs(setName) :
  	
  	con = conf.db
  	try :
  		SMaster = SNPMaster(setName = setName)
  		con.beginTransaction()
  		SNPType = SMaster.SNPType
  		con.delete(SNPType, 'setName = ?', (setName,))
  		SMaster.delete()
  		con.endTransaction()
  	except KeyError :
  		raise KeyError("Can't delete the setName %s because i can't find it in SNPMaster, maybe there's not set by that name" % setName)
  		#~ printf("can't delete the setName %s because i can't find it in SNPMaster, maybe there's no set by that name" % setName)
  		return False
  	return True
docs: deletes a set of polymorphisms