我在安装我的Django Web应用程序的pythonanywhere中反复得到[NameError：名称'_mysql'未在其中定义”？

如何解决我在安装我的Django Web应用程序的pythonanywhere中反复得到[NameError：名称'_mysql'未在其中定义”？

我已经安装了requirements.txt [mysql，django等]。创建了数据库。在pythonanywhere外壳程序上迁移并查看了mysql（具有与设置中相同的凭据）。一切都很好。所有的表都存在，但我找不到错误的地方。请帮助解决此错误。这些是相关文件：-

（django 3.1.1 python3 3.8.0 适用于Linux（x86_64）（使用EditLine包装器）的mysql Ver 14.14 Distrib 5.7.27）

自动生成的wsgi.py

import os
import sys

# # assuming your django settings file is at '/home/proj/mysite/mysite/settings.py'
# # and your manage.py is is at '/home/proj/mysite/manage.py'
path = '/home/proj/proj'
if path not in sys.path:
    sys.path.append(path)

os.environ['DJANGO_SETTINGS_MODULE'] = 'project3.settings'
# # then:
from django.core.wsgi import get_wsgi_application
application = get_wsgi_application()

数据库设置。py

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql','NAME': 'proj$proj','USER': 'proj','PASSWORD': '*****','HOST': 'proj.mysql.pythonanywhere-services.com',}
}

错误日志

2020-09-04 17:07:32,532: NameError: name '_mysql' is not defined
2020-09-04 17:07:32,532:   File "/var/www/proj_pythonanywhere_com_wsgi.py",line 39,in <module>
2020-09-04 17:07:32,532:     application = get_wsgi_application()
2020-09-04 17:07:32,532: 
2020-09-04 17:07:32,532:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/core/wsgi.py",line 12,in get_wsgi_application
2020-09-04 17:07:32,532:     django.setup(set_prefix=False)
2020-09-04 17:07:32,533: 
2020-09-04 17:07:32,533:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/__init__.py",line 24,in setup
2020-09-04 17:07:32,533:     apps.populate(settings.INSTALLED_APPS)
2020-09-04 17:07:32,533:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/apps/registry.py",line 114,in populate
2020-09-04 17:07:32,533:     app_config.import_models()
2020-09-04 17:07:32,533:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/apps/config.py",line 211,in import_models
2020-09-04 17:07:32,534:     self.models_module = import_module(models_module_name)
2020-09-04 17:07:32,534: 
2020-09-04 17:07:32,534:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/contrib/auth/models.py",line 2,534:     from django.contrib.auth.base_user import AbstractBaseUser,BaseUserManager
2020-09-04 17:07:32,534:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/contrib/auth/base_user.py",line 48,534:     class AbstractBaseUser(models.Model):
2020-09-04 17:07:32,535:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/db/models/base.py",line 122,in __new__
2020-09-04 17:07:32,535:     new_class.add_to_class('_meta',Options(meta,app_label))
2020-09-04 17:07:32,535: 
2020-09-04 17:07:32,line 326,in add_to_class
2020-09-04 17:07:32,535:     value.contribute_to_class(cls,name)
2020-09-04 17:07:32,535:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/db/models/options.py",line 206,in contribute_to_class
2020-09-04 17:07:32,535:     self.db_table = truncate_name(self.db_table,connection.ops.max_name_length())
2020-09-04 17:07:32,536:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/db/__init__.py",line 28,in __getattr__
2020-09-04 17:07:32,536:     return getattr(connections[DEFAULT_DB_ALIAS],item)
2020-09-04 17:07:32,536: 
2020-09-04 17:07:32,536:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/db/utils.py",line 214,in __getitem__
2020-09-04 17:07:32,536:     backend = load_backend(db['ENGINE'])
2020-09-04 17:07:32,line 111,in load_backend
2020-09-04 17:07:32,536:     return import_module('%s.base' % backend_name)
2020-09-04 17:07:32,537:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/django/db/backends/mysql/base.py",line 15,537:     import MySQLdb as Database
2020-09-04 17:07:32,537: 
2020-09-04 17:07:32,537:   File "/home/proj/proj/vad_env/lib/python3.8/site-packages/MySQLdb/__init__.py",537:     version_info,_mysql.version_info,_mysql.__file__