SyntaxError:Generator表达式必须是parenthezised/python manage.py migrate

Question

我是编程新手,我想跟随Djangogirls教程,但我现在被困了.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(我们需要在包含manage.py文件的djangogirls目录中).如果情况顺利,你应该看到这样的事情:......

在教程中没有失败的选项,但我有一条错误消息:

(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？我该怎么办？

我有Python 3.7.0b1

非常感谢提前帮助:)

Answer 1

你没有做错什么; 这是Django和Python 3.7之间的问题.Django有一个修复,但该修复尚未成为新版本.

在此期间,您可以安装稳定版本的Python,Python 3.6.

Answer 2

此外,升级Django解决了我的问题

在你的终端上,

$ pip install -U Django

或者看这里

Answer 3

这是Django与Python 3.7之间的已知不兼容性。修复程序已合并到Django 2.x分支中，并反向移植到1.11分支中。

要解决此问题，只需将Django更新至少为1.11.17版（或2.x），或者将Python降级至3.6版。