老师我每次打开虚拟机电脑就蓝屏了，为什么

老师在最后说可以使用 th:src  和 th:action 指定跳转链接，那么 href里应该怎么写呢？

老师你好，这个问题怎么解决，看网上也没有方法。

F:\Python_VirtualEnv\django_test\Scripts\python.exe D:/Django_框架/toolbar_study/manage.py runserver 9000

Watching for file changes with StatReloader

Performing system checks...

Exception in thread django-main-thread:

Traceback (most recent call last):

  File "c:\program files\python38\lib\threading.py", line 932, in _bootstrap_inner

    self.run()

  File "c:\program files\python38\lib\threading.py", line 870, in run

    self._target(*self._args, **self._kwargs)

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper

    fn(*args, **kwargs)

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\core\management\commands\runserver.py", line 118, in inner_run

    self.check(display_num_errors=True)

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\core\management\base.py", line 392, in check

    all_issues = checks.run_checks(

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\core\checks\registry.py", line 70, in run_checks

    new_errors = check(app_configs=app_configs, databases=databases)

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\core\checks\urls.py", line 13, in check_url_config

    return check_resolver(resolver)

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver

    return check_method()

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\urls\resolvers.py", line 408, in check

    for pattern in self.url_patterns:

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\utils\functional.py", line 48, in __get__

    res = instance.__dict__[self.name] = self.func(instance)

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\urls\resolvers.py", line 589, in url_patterns

    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\utils\functional.py", line 48, in __get__

    res = instance.__dict__[self.name] = self.func(instance)

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\urls\resolvers.py", line 582, in urlconf_module

    return import_module(self.urlconf_name)

  File "c:\program files\python38\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:\Django_框架\toolbar_study\toolbar_study\urls.py", line 30, in <module>

    path('__debug__/', include(debug_toolbar.urls)),

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\django\urls\conf.py", line 34, in include

    urlconf_module = import_module(urlconf_module)

  File "c:\program files\python38\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 "F:\Python_VirtualEnv\django_test\lib\site-packages\debug_toolbar\toolbar.py", line 17, in <module>

    from debug_toolbar import settings as dt_settings

  File "F:\Python_VirtualEnv\django_test\lib\site-packages\debug_toolbar\settings.py", line 7, in <module>

    from django.utils.lru_cache import lru_cache

ModuleNotFoundError: No module named 'django.utils.lru_cache'

老师，报这个错误怎么解决啊

老师，请问，课堂笔记中写的using hash是什么意思呢，我按照这样写会出错

请问老师这是什么意思呢，我都是照着视频里敲得代码

老师，28阶段更新完了没有                           

老师 为啥 函数能调用类里面的函数方法？

很多依赖都爆红是啥问题

<img src="../" alt="">

老师，我想问一下，此处的../为什么是返回到src，而不是返回到src下的images

老师，有两个地方不理解

1. 这个father-id有什么用?

2. 这个father-id是怎么弄出来的？2和5什么意思？

就不能给新的tomcat么。jdk13的用不了都。咋不更新

LoginView(MethodView):
    (msg = ):
        render_template(=msg)

    ():
        uname = request.form.get()
        pwd = request.form.get()
        uname == pwd == :
            :
            .get(=)

app.add_url_rule(=LoginView.as_view())

为什么，这个None会显示在页面上

我感觉下面的说法不对,左边的结果不是一个数吗，右边的结果是一个矩阵，怎么能划等号?

老师这个报错，却怎么也引不过来？请指点！！！