Django学习笔记-Django1.11 python manage.py migrate执行出错

学习python编程 从入门到实践第18章时，创建数据库失败

python manage.py migrate 执行失败，报错：

'%s=%s' % (k, v) for k, v in params.items(),

SyntaxError: Generator expression must be parenthesized

解决方法：

找到widgets.py文件，使用vim编辑器打开

修改

'%s=%s' % (k, v) for k, v in params.items(), 

为：

'%s=%s' % (k, v) for k, v in params.items()

然后再次执行 python manage.py migrate 即成功

System check identified no issues (0 silenced).
(ll_env) [wangq@localhost Django]$ python3 manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, sessions
Running migrations:
  Applying contenttypes.0001_initial... OK
  Applying auth.0001_initial... OK
  Applying admin.0001_initial... OK
  Applying admin.0002_logentry_remove_auto_add... OK
  Applying contenttypes.0002_remove_content_type_name... OK
  Applying auth.0002_alter_permission_name_max_length... OK
  Applying auth.0003_alter_user_email_max_length... OK
  Applying auth.0004_alter_user_username_opts... OK
  Applying auth.0005_alter_user_last_login_null... OK
  Applying auth.0006_require_contenttypes_0002... OK
  Applying auth.0007_alter_validators_add_error_messages... OK
  Applying auth.0008_alter_user_username_max_length... OK
  Applying sessions.0001_initial... OK