Traceback (most recent call last):
File "/usr/local/lib/python3.10/dist-packages/django/db/backends/mysql/base.py", line 15, in <module>
import MySQLdb as Database
ModuleNotFoundError: No module named 'MySQLdb'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/local/bin/daphne", line 8, in <module>
sys.exit(CommandLineInterface.entrypoint())
File "/usr/local/lib/python3.10/dist-packages/daphne/cli.py", line 171, in entrypoint
cls().run(sys.argv[1:])
File "/usr/local/lib/python3.10/dist-packages/daphne/cli.py", line 233, in run
application = import_by_path(args.application)
File "/usr/local/lib/python3.10/dist-packages/daphne/utils.py", line 12, in import_by_path
target = importlib.import_module(module_path)
File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
File "<frozen importlib._bootstrap>", line 992, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 883, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "/home/lang/GreaterWMS/./greaterwms/__init__.py", line 4, in <module>
django.setup()
File "/usr/local/lib/python3.10/dist-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/usr/local/lib/python3.10/dist-packages/django/apps/registry.py", line 116, in populate
app_config.import_models()
File "/usr/local/lib/python3.10/dist-packages/django/apps/config.py", line 269, in import_models
self.models_module = import_module(models_module_name)
File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 883, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "/usr/local/lib/python3.10/dist-packages/django/contrib/auth/models.py", line 3, in <module>
from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
File "/usr/local/lib/python3.10/dist-packages/django/contrib/auth/base_user.py", line 49, in <module>
class AbstractBaseUser(models.Model):
File "/usr/local/lib/python3.10/dist-packages/django/db/models/base.py", line 141, in __new__
new_class.add_to_class("_meta", Options(meta, app_label))
File "/usr/local/lib/python3.10/dist-packages/django/db/models/base.py", line 369, in add_to_class
value.contribute_to_class(cls, name)
File "/usr/local/lib/python3.10/dist-packages/django/db/models/options.py", line 231, in contribute_to_class
self.db_table, connection.ops.max_name_length()
File "/usr/local/lib/python3.10/dist-packages/django/utils/connection.py", line 15, in __getattr__
return getattr(self._connections[self._alias], item)
File "/usr/local/lib/python3.10/dist-packages/django/utils/connection.py", line 62, in __getitem__
conn = self.create_connection(alias)
File "/usr/local/lib/python3.10/dist-packages/django/db/utils.py", line 193, in create_connection
backend = load_backend(db["ENGINE"])
File "/usr/local/lib/python3.10/dist-packages/django/db/utils.py", line 113, in load_backend
return import_module("%s.base" % backend_name)
File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "/usr/local/lib/python3.10/dist-packages/django/db/backends/mysql/base.py", line 17, in <module>
raise ImproperlyConfigured(
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module.
Did you install mysqlclient?
在Django项目中，若需将MySQLdb替换为pymysql，只需在项目的__init__.py文件中添加两行代码：首先导入pymysql，然后调用pymysql的install_as_MySQLdb()函数。如果未安装pymysql，需要先通过pip install pymysql进行安装。此方法经过验证，可以成功实现替换。
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