code: def main(argv=sys.argv):
      
      if len(argv) < 2:
          usage(argv)
  
      config_uri = argv[1]
  
      setup_logging(config_uri)
  
      settings = get_appsettings(config_uri)
  
      engine = engine_from_config(settings, "sqlalchemy.")
  
      DBSession.configure(bind=engine)
  
      Base.metadata.create_all(engine)
  
      for i in range(30):
          with transaction.manager:
              address = Address(description="Address#2" + str(i).rjust(2, "0"))
  
              DBSession.add(address)
  
              user = User(
                  name="User#1" + str(i).rjust(2, "0"),
                  birthday=date(1980 + i % 8, i % 12 + 1, i % 10 + 1))
  
              user.address = address
  
              DBSession.add(user)
docs: Populate database with 30 users.