语法错误：生成器表达式必须加括号/python manage.py migrate

Question

新手上路，请多包涵

我真的是编程新手，我想遵循 Djangogirls 教程，但我现在被困住了。在教程中，我在这里：

要为我们的博客创建数据库，让我们在控制台中运行以下命令：python manage.py migrate（我们需要位于包含 manage.py 文件的 djangogirls 目录中）。如果一切顺利，您应该会看到如下内容： …

本教程中没有失败选项，但我收到一条错误消息：

 (myvenv) C:\Users\Julcsi\djangogirls> python manage.py migrate
Traceback (most recent call last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\core\management__init__.py",
line 364, in execute_from_command_line
utility.execute()
File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\core\management__init__.py",
line 338, in execute
django.setup()
File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django__init__.py",
line 27, in setup
apps.populate(settings.INSTALLED_APPS)
File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\apps\registry.py",
line 85, in populate
app_config = AppConfig.create(entry)
File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\apps\config.py",
line 94, in create
module = import_module(entry)
File "C:\Users\Julcsi\AppData\Local\Programs\Python\Python37\lib\importlib__init__.py",
line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 723, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_remove
File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\contrib\admin__init__.py",
line 4, in <module>
from django.contrib.admin.filters import (
File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\contrib\admin\filters.py",
line 10, in <module>
from django.contrib.admin.options import IncorrectLookupParameters
File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\contrib\admin\options.py",
line 12, in <module>
from django.contrib.admin import helpers, widgets
File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\contrib\admin\widgets.py",
line 152
'%s=%s' % (k, v) for k, v in params.items(),
SyntaxError: Generator expression must be parenthesized

我究竟做错了什么？我应该怎么办？

我有 Python 3.7.0b1

非常感谢您的帮助:)