在尝试使用 进行迁移时python manage.py runserver，我得到了以下回溯：
Traceback (most recent call last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/home/infinity/.virtualenvs/project/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
utility.execute()
File "/home/infinity/.virtualenvs/project/lib/python3.6/site-packages/django/core/management/__init__.py", line 338, in execute
django.setup()
File "/home/infinity/.virtualenvs/project/lib/python3.6/site-packages/django/__init__.py", line 27, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/infinity/.virtualenvs/project/lib/python3.6/site-packages/django/apps/registry.py", line 85, in populate
app_config = AppConfig.create(entry)
File "/home/infinity/.virtualenvs/project/lib/python3.6/site-packages/django/apps/config.py", line 94, in create
module = import_module(entry)
File "/home/infinity/.virtualenvs/project/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 …