我的Django项目是由2.0.8创建的，我想更新Django的版本，因为文档说“ 该文档适用于不再受支持的Django的不安全版本。请升级到较新的版本！”。在更新后，当我再次使用命令python manager.py runserver时，引发了错误：
"Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/utils/autoreload.py", line 54, in wrapper
fn(*args, **kwargs)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 109, in inner_run
autoreload.raise_last_exception()
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/utils/autoreload.py", line 77, in raise_last_exception
raise _exception[0](_exception[1]).with_traceback(_exception[2])
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/utils/autoreload.py", line 54, in wrapper
fn(*args, **kwargs)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/apps/registry.py", line 114, in populate
app_config.import_models()
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/apps/config.py", line 211, in import_models
self.models_module = import_module(models_module_name)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/importlib/__init__.py", line 126, 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 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/contrib/auth/models.py", line 2, in <module>
from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/contrib/auth/base_user.py", line 47, in <module>
class AbstractBaseUser(models.Model):
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/db/models/base.py", line 117, in __new__
new_class.add_to_class('_meta', Options(meta, app_label))
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/db/models/base.py", line 321, in add_to_class
value.contribute_to_class(cls, name)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/db/models/options.py", line 204, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/db/__init__.py", line 28, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/db/utils.py", line 201, in __getitem__
backend = load_backend(db['ENGINE'])
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/db/utils.py", line 110, in load_backend
return import_module('%s.base' % backend_name)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 36, in <module>
raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)
django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.
Traceback (most recent call last):
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/apps/registry.py", line 155, in get_app_config
return self.app_configs[app_label]
KeyError: 'admin'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "../KitCat/manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
utility.execute()
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/core/management/base.py", line 323, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 60, in execute
super().execute(*args, **options)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/core/management/base.py", line 364, in execute
output = self.handle(*args, **options)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 95, in handle
self.run(**options)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 102, in run
autoreload.run_with_reloader(self.inner_run, **options)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/utils/autoreload.py", line 579, in run_with_reloader
start_django(reloader, main_func, *args, **kwargs)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/utils/autoreload.py", line 564, in start_django
reloader.run(django_main_thread)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/utils/autoreload.py", line 272, in run
get_resolver().urlconf_module
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/utils/functional.py", line 80, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/urls/resolvers.py", line 564, in urlconf_module
return import_module(self.urlconf_name)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/importlib/__init__.py", line 126, 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 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/Users/duke/Documents/python/KitCat/KitCat/urls.py", line 21, in <module>
path('admin/', admin.site.urls),
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/utils/functional.py", line 256, in inner
self._setup()
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/contrib/admin/sites.py", line 529, in _setup
AdminSiteClass = import_string(apps.get_app_config('admin').default_site)
File "/Users/duke/Documents/python/django_test/env/lib/python3.6/site-packages/django/apps/registry.py", line 162, in get_app_config
raise LookupError(message)
LookupError: No installed app with label 'admin'."
顺便说一句，该项目在2.0.8版本下还可以
所以我的问题是： 1.发生了什么事？ 2.如何解决这个问题？ 3.还有什么我需要知道的吗？
非常感谢您为我解决此问题。
答案 0 :(得分：0)
真正的问题埋在了回溯中，您的mysqlclient版本已经过时：
django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.