code: def migrate(self, migrations_package_name, up_to=9999):
          '''
          Executes schema migrations.
  
          - `migrations_package_name` - fully qualified name of the Python package
            containing the migrations.
          - `up_to` - number of the last migration to apply.
          '''
          from .migrations import MigrationHistory
          logger = logging.getLogger('migrations')
          applied_migrations = self._get_applied_migrations(migrations_package_name)
          modules = import_submodules(migrations_package_name)
          unapplied_migrations = set(modules.keys()) - applied_migrations
          for name in sorted(unapplied_migrations):
              logger.info('Applying migration %s...', name)
              for operation in modules[name].operations:
                  operation.apply(self)
              self.insert([MigrationHistory(package_name=migrations_package_name, module_name=name, applied=datetime.date.today())])
              if int(name[:4]) >= up_to:
                  breaf migrate(self, migrations_package_name, up_to=9999):
          '''
          Executes schema migrations.
  
          - `migrations_package_name` - fully qualified name of the Python package
            containing the migrations.
          - `up_to` - number of the last migration to apply.
          '''
          from .migrations import MigrationHistory
          logger = logging.getLogger('migrations')
          applied_migrations = self._get_applied_migrations(migrations_package_name)
          modules = import_submodules(migrations_package_name)
          unapplied_migrations = set(modules.keys()) - applied_migrations
          for name in sorted(unapplied_migrations):
              logger.info('Applying migration %s...', name)
              for operation in modules[name].operations:
                  operation.apply(self)
              self.insert([MigrationHistory(package_name=migrations_package_name, module_name=name, applied=datetime.date.today())])
              if int(name[:4]) >= up_to:
                  break
docs: Executes schema migrations.
  
          - `migrations_package_name` - fully qualified name of the Python package
            containing the migrations.
          - `up_to` - number of the last migration to apply.