为什么向bashrc添加导出DJANGO_SETTINGS_MODULE ='myproject.settings'不再有效？

我有一个在Linux机器上运行的Django应用程序(Debian).在过去的一段时间里,应用程序已经完美运行.最近我需要在芹菜任务开始挂起后重启机器,并且清除任务没有达到预期的效果.当我现在尝试使用芹菜时

sudo celery -A myapp.tasks worker -Ofair 

我得到了以下回溯

Traceback (most recent call last):
  File "/usr/local/bin/celery", line 9, in 
    load_entry_point('celery==3.1.11', 'console_scripts', 'celery')()
  File "/usr/local/lib/python2.7/dist-packages/celery/__main__.py", line 30, in main
    main()
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py", line 81, in main
    cmd.execute_from_commandline(argv)
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py", line 769, in execute_from_commandline
    super(CeleryCommand, self).execute_from_commandline(argv)))
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 304, in execute_from_commandline
    argv = self.setup_app_from_commandline(argv)
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 464, in setup_app_from_commandline
    self.app = self.find_app(app)
  File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 484, in find_app
    return find_app(app, symbol_by_name=self.symbol_by_name)
  File "/usr/local/lib/python2.7/dist-packages/celery/app/utils.py", line 225, in find_app
    sym = imp(app)
  File "/usr/local/lib/python2.7/dist-packages/celery/utils/imports.py", line 101, in import_from_cwd
    return imp(module, package=package)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/this/gce_app/myapp/tasks.py", line 8, in 
    from django.views.decorators.csrf import csrf_exempt
  File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/csrf.py", line 1, in 
    from django.middleware.csrf import CsrfViewMiddleware, get_token
  File "/usr/local/lib/python2.7/dist-packages/django/middleware/csrf.py", line 14, in 
    from django.utils.cache import patch_vary_headers
  File "/usr/local/lib/python2.7/dist-packages/django/utils/cache.py", line 26, in 
    from django.core.cache import get_cache
  File "/usr/local/lib/python2.7/dist-packages/django/core/cache/__init__.py", line 69, in 
    if DEFAULT_CACHE_ALIAS not in settings.CACHES:
  File "/usr/local/lib/python2.7/dist-packages/django/conf/__init__.py", line 54, in __getattr__
    self._setup(name)
  File "/usr/local/lib/python2.7/dist-packages/django/conf/__init__.py", line 47, in _setup
    % (desc, ENVIRONMENT_VARIABLE))
django.core.exceptions.ImproperlyConfigured: Requested setting CACHES, but settings are not configured. You must
 either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing set
tings.

我已经将导出添加到bashrc(最后),它解决了过去的问题,但现在我仍然遇到了同样的错误:

sudo nano ~/.bashrc
export DJANGO_SETTINGS_MODULE='myproject.settings'

有没有办法让这个再次运作？