code: def migrate(db, name, package, conf={}):
      
      (current_major_version, current_minor_version) = get_version(db, name)
      package = importlib.import_module(package)
      logging.debug('Migration version for %s is %s.%s',
                    package.__name__,
                    current_major_version,
                    current_minor_version)
      mods = get_mods(package)
      migrations = get_new(mods,
                           current_major_version,
                           current_minor_version + 1)
      for (modname, major_version, minor_version) in migrations:
          mod = load_mod(modname, package)
          run_migration(name, major_version, minor_version, db, mod, conf)
          logging.debug("Finished migrating to %s", modname)
docs: Run all migrations that have not been run
  
      Migrations will be run inside a transaction.
  
      :param db:              database connection object
      :param name:            name associated with the migrations
      :param package:         package that contains the migrations
      :param conf:            application configuration object