在使用 Django 进行本地数据库同步时，可能会遇到以下错误：

python manage.py syncdb
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 261, in fetch_command
    klass = load_command_class(app_name, subcommand)
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 69, in load_command_class
    module = import_module('%s.management.commands.%s' % (app_name, name))
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 8, in <module>
    from django.core.management.sql import custom_sql_for_model, emit_post_sync_signal
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/core/management/sql.py", line 6, in <module>
    from django.db import models
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/db/__init__.py", line 11, in <module>
    if DEFAULT_DB_ALIAS not in settings.DATABASES:
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/utils/functional.py", line 184, in inner
    self._setup()
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/conf/__init__.py", line 42, in _setup
    self._wrapped = Settings(settings_module)
  File "/home/wtodom/hellodjango/venv/local/lib/python2.7/site-packages/django/conf/__init__.py", line 95, in __init__
    raise ImportError("Could not import settings '%s' (Is it on sys.path?): %s" % (self.SETTINGS_MODULE, e))
ImportError: Could not import settings '/home/wtodom/hellodjango/hellodjango/settings.py' (Is it on sys.path?): Import by filename is not supported.

2. 解决方案

错误原因是缺少数据库引擎配置。要解决此问题，请按照以下步骤操作：

1. 打开项目目录下的 settings.py 文件。
2. 在 DATABASES 字典中，添加以下配置：

{
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'YOUR_DATABASE_NAME',
        'USER': 'YOUR_DATABASE_USER',
        'PASSWORD': 'YOUR_DATABASE_PASSWORD',
        'HOST': 'YOUR_DATABASE_HOST',
        'PORT': 'YOUR_DATABASE_PORT',
    }
}

3. 将 YOUR_DATABASE_NAME 替换为您的数据库名称。
4. 将 YOUR_DATABASE_USER 替换为您的数据库用户名。
5. 将 YOUR_DATABASE_PASSWORD 替换为您的数据库密码。
6. 将 YOUR_DATABASE_HOST 替换为您的数据库主机地址。
7. 将 YOUR_DATABASE_PORT 替换为您的数据库端口号。

确保已安装 psycopg2 包，这是 Python 用于连接 PostgreSQL 数据库的库。您可以使用以下命令安装：

pip install psycopg2

保存 settings.py 文件，然后再次运行 python manage.py syncdb 命令。如果您的数据库配置正确，则应该能够成功同步数据库。