阿里云服务器出现 Resource stopwords not found. Please use the NLTK Downloader to obtain the resource:

出现的问题

在阿里云ubuntu服务器布置Django项目中出现如下错误：

  Resource stopwords not found.
  Please use the NLTK Downloader to obtain the resource:

具体如下所示：

Watching for file changes with StatReloader
Performing system checks...

Exception in thread django-main-thread:
Traceback (most recent call last):
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/nltk/corpus/util.py", line 86, in __load
    root = nltk.data.find('{}/{}'.format(self.subdir, zip_name))
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/nltk/data.py", line 701, in find
    raise LookupError(resource_not_found)
LookupError: 
**********************************************************************
  Resource stopwords not found.
  Please use the NLTK Downloader to obtain the resource:

  >>> import nltk
  >>> nltk.download('stopwords')
  
  For more information see: https://www.nltk.org/data.html

  Attempted to load corpora/stopwords.zip/stopwords/

  Searched in:
    - '/root/nltk_data'
    - '/root/.virtualenvs/T/nltk_data'
    - '/root/.virtualenvs/T/share/nltk_data'
    - '/root/.virtualenvs/T/lib/nltk_data'
    - '/usr/share/nltk_data'
    - '/usr/local/share/nltk_data'
    - '/usr/lib/nltk_data'
    - '/usr/local/lib/nltk_data'
**********************************************************************


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.5/threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/utils/autoreload.py", line 54, in wrapper
    fn(*args, **kwargs)
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 117, in inner_run
    self.check(display_num_errors=True)
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/core/management/base.py", line 390, in check
    include_deployment_checks=include_deployment_checks,
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/core/management/base.py", line 377, in _run_checks
    return checks.run_checks(**kwargs)
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/core/checks/registry.py", line 72, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/core/checks/urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/core/checks/urls.py", line 23, in check_resolver
    return check_method()
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/urls/resolvers.py", line 399, in check
    for pattern in self.url_patterns:
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/utils/functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/urls/resolvers.py", line 584, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/utils/functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/django/urls/resolvers.py", line 577, in urlconf_module
    return import_module(self.urlconf_name)
  File "/root/.virtualenvs/T/lib/python3.5/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 665, in exec_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "/home/recommend_system-master/recommend_system/urls.py", line 18, in <module>
    import movie_recommend.views
  File "/home/recommend_system-master/movie_recommend/views.py", line 15, in <module>
    from movie_recommend.load_data import *
  File "/home/recommend_system-master/movie_recommend/load_data.py", line 19, in <module>
    stoplist = stopwords.words('english')
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/nltk/corpus/util.py", line 123, in __getattr__
    self.__load()
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/nltk/corpus/util.py", line 88, in __load
    raise e
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/nltk/corpus/util.py", line 83, in __load
    root = nltk.data.find('{}/{}'.format(self.subdir, self.__name))
  File "/root/.virtualenvs/T/lib/python3.5/site-packages/nltk/data.py", line 701, in find
    raise LookupError(resource_not_found)
LookupError: 
**********************************************************************
  Resource stopwords not found.
  Please use the NLTK Downloader to obtain the resource:

  >>> import nltk
  >>> nltk.download('stopwords')
  
  For more information see: https://www.nltk.org/data.html

  Attempted to load corpora/stopwords

  Searched in:
    - '/root/nltk_data'
    - '/root/.virtualenvs/T/nltk_data'
    - '/root/.virtualenvs/T/share/nltk_data'
    - '/root/.virtualenvs/T/lib/nltk_data'
    - '/usr/share/nltk_data'
    - '/usr/local/share/nltk_data'
    - '/usr/lib/nltk_data'
    - '/usr/local/lib/nltk_data'
**********************************************************************

解决的思路：

ubuntu中打开python3解释器

  >>>python3 
  >>> import nltk
  >>> nltk.download('stopwords')

再次重启Django项目即可正确运行