为提高效率，提问时请提供以下信息，问题描述清晰可优先响应。
【DM版本】:2012.10.21
【操作系统】：win10
【CPU】:
【问题描述】*：
我在做毕设，尝试用 django 链接达梦数据库。完全按照文档：达梦：Django 框架 进行操作。并成功连接到达梦数据库。

有大哥有解决方法的话，直接打我电话也行：15011373696
python版本：3.7

• Django 3.1.7
• django_dmPython 3.1.7
• dmPython 2.3

但是在进行到设置 DATABASES 设置项时出现了问题。

DATABASES = {
    'default': {
        'ENGINE': 'django_dmPython',  # 使用的数据库后端
        'NAME': 'DAMENG',
        'USER': 'SYSDBA',
        'PASSWORD': 'SYSDBA',
        'HOST': '172.0.0.1',
        'PORT': '5237',
        'OPTIONS': {'local_code': 1, 'connection_timeout': 5}
    }

此时会出现如下报错：

G:\pythonProject\dm8_django317\mysite\mysite\settings.py changed, reloading.
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "G:\Anaconda\lib\site-packages\django\db\utils.py", line 111, in load_backend
    return import_module('%s.base' % backend_name)
  File "G:\Anaconda\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "G:\Anaconda\lib\site-packages\django_dmPython\base.py", line 18, in <module>
    from django.utils.deprecation import RemovedInDjango30Warning
ImportError: cannot import name 'RemovedInDjango30Warning' from 'django.utils.deprecation' (G:\Anaconda\lib\site-packages\django\utils\deprecation.py)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "G:\Anaconda\lib\threading.py", line 926, in _bootstrap_inner
    self.run()
  File "G:\Anaconda\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "G:\Anaconda\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "G:\Anaconda\lib\site-packages\django\core\management\commands\runserver.py", line 110, in inner_run
    autoreload.raise_last_exception()
  File "G:\Anaconda\lib\site-packages\django\utils\autoreload.py", line 76, in raise_last_exception
    raise _exception[1]
  File "G:\Anaconda\lib\site-packages\django\core\management\__init__.py", line 357, in execute
    autoreload.check_errors(django.setup)()
  File "G:\Anaconda\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "G:\Anaconda\lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "G:\Anaconda\lib\site-packages\django\apps\registry.py", line 114, in populate
    app_config.import_models()
  File "G:\Anaconda\lib\site-packages\django\apps\config.py", line 211, in import_models
    self.models_module = import_module(models_module_name)
  File "G:\Anaconda\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "G:\Anaconda\lib\site-packages\django\contrib\auth\models.py", line 2, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "G:\Anaconda\lib\site-packages\django\contrib\auth\base_user.py", line 48, in <module>
    class AbstractBaseUser(models.Model):
  File "G:\Anaconda\lib\site-packages\django\db\models\base.py", line 122, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "G:\Anaconda\lib\site-packages\django\db\models\base.py", line 326, in add_to_class
    value.contribute_to_class(cls, name)
  File "G:\Anaconda\lib\site-packages\django\db\models\options.py", line 206, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "G:\Anaconda\lib\site-packages\django\db\__init__.py", line 28, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "G:\Anaconda\lib\site-packages\django\db\utils.py", line 214, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "G:\Anaconda\lib\site-packages\django\db\utils.py", line 126, in load_backend
    ) from e_user
django.core.exceptions.ImproperlyConfigured: 'django_dmPython' isn't an available database backend.
Try using 'django.db.backends.XXX', where XXX is one of:
    'mysql', 'oracle', 'postgresql', 'sqlite3'

以下报错 ，说明 django_dmPython 不是可用的数据库后端。

django.core.exceptions.ImproperlyConfigured: 'django_dmPython' isn't an available database backend.
Try using 'django.db.backends.XXX', where XXX is one of:
    'mysql', 'oracle', 'postgresql', 'sqlite3'

我在网上查阅了相关代码，别人写的 ‘django_dmPython’是可用的。我不知道我错在哪里？

为证明我dmpython环境配置没有问题，我这边编写的程序来证明：

# coding:utf-8
import dmPython

try:
    conn = dmPython.connect(user='SYSDBA', password='SYSDBA', server='127.0.0.1', port=5237)
    cursor = conn.cursor()
    print('python: conn success!')
    try:
        # 清空表，初始化测试环境
        cursor.execute('delete from "NewRetail"."user"')
        print('del')
        cursor.execute('insert into "NewRetail"."user"("phone") VALUES (15011373696);')
        print('python: insert success!')
        cursor.execute('select * from "NewRetail"."user"')
        res = cursor.fetchall()
        for tmp in res:
            print(tmp)
    except (dmPython.Error, Exception) as err:
        None
    except (dmPython.Error, Exception) as err:
        print(err)
    conn.close()
except (dmPython.Error, Exception) as err:
    print(err)

返回结果：

G:\Anaconda\python.exe G:/pythonProject/dm8_django317/test.py
python: conn success!
del
python: insert success!
(27, '15011373696', None, None)

进程已结束，退出代码为 0