Django项目启动报错

date: 2021-11-08title: Generator expression must be parenthesized (widgets.py, line 151) #标题
tags: #标签
categories: python # 分类

Django项目启动报错：

"D:\software\PyCharm 2019.3.3\bin\runnerw64.exe" D:\software\python\python.exe D:/django_demo/first_pro/manage.py runserver 8000
Exception ignored in thread started by: <function check_errors.<locals>.wrapper at 0x0000022298A041F0>
Traceback (most recent call last):
  File "D:\software\python\lib\site-packages\django\utils\autoreload.py", line 228, in wrapper
    fn(*args, **kwargs)
  File "D:\software\python\lib\site-packages\django\core\management\commands\runserver.py", line 117, in inner_run
    autoreload.raise_last_exception()
  File "D:\software\python\lib\site-packages\django\utils\autoreload.py", line 251, in raise_last_exception
    six.reraise(*_exception)
  File "D:\software\python\lib\site-packages\django\utils\six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "D:\software\python\lib\site-packages\django\utils\autoreload.py", line 228, in wrapper
    fn(*args, **kwargs)
  File "D:\software\python\lib\site-packages\django\__init__.py", line 27, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "D:\software\python\lib\site-packages\django\apps\registry.py", line 85, in populate
    app_config = AppConfig.create(entry)
  File "D:\software\python\lib\site-packages\django\apps\config.py", line 94, in create
    module = import_module(entry)
  File "D:\software\python\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "D:\software\python\lib\site-packages\django\contrib\admin\__init__.py", line 4, in <module>
    from django.contrib.admin.filters import (
  File "D:\software\python\lib\site-packages\django\contrib\admin\filters.py", line 10, in <module>
    from django.contrib.admin.options import IncorrectLookupParameters
  File "D:\software\python\lib\site-packages\django\contrib\admin\options.py", line 12, in <module>
    from django.contrib.admin import helpers, widgets
SyntaxError: Generator expression must be parenthesized (widgets.py, line 151)

问题原因

由于django 1.11版本和python3.7版本不兼容, 2.0版本以后的Django修复了这个问题。

解决方法

方法一

找到对应路径下的widgets.py（我这里的绝对路径为："D:\software\python\Lib\site-packages\django\contrib\admin\widgets.py"）,将逗号删除即可：

方法二

升级Django版本

$ pip install -U Django