Django教程中出现no module named staticfilespolls错误

Question

我之前做了这个教程的第一部分，但遇到了一些问题，发现有好几个版本的教程。于是我删除了polls和mysite这两个文件夹，重新开始。不过，当我运行

$ python manage.py sql polls

时，结果是：

     c:\Python27\Scripts\mysite>python manage.py sql polls
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line
399, in execute_from_command_line
    utility.execute()
  File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line
392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Python27\lib\site-packages\django\core\management\base.py", line 242,
 in run_from_argv
    self.execute(*args, **options.__dict__)
  File "C:\Python27\lib\site-packages\django\core\management\base.py", line 280,
 in execute
    translation.activate('en-us')
  File "C:\Python27\lib\site-packages\django\utils\translation\__init__.py", lin
e 130, in activate
    return _trans.activate(language)
  File "C:\Python27\lib\site-packages\django\utils\translation\trans_real.py", l
ine 188, in activate
    _active.value = translation(language)
  File "C:\Python27\lib\site-packages\django\utils\translation\trans_real.py", l
ine 177, in translation
    default_translation = _fetch(settings.LANGUAGE_CODE)
  File "C:\Python27\lib\site-packages\django\utils\translation\trans_real.py", l
ine 159, in _fetch
    app = import_module(appname)
  File "C:\Python27\lib\site-packages\django\utils\importlib.py", line 40, in im
port_module
    __import__(name)
ImportError: No module named staticfilespolls

在settings.py文件中

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles'
    'polls',
)

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}

我搞不清楚错误是从哪里来的。

Answer 1

你在 INSTALLED_APPS 设置中，django.contrib.staticfiles 后面缺少一个逗号。

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',  # HERE
    'polls',
)

如果没有逗号，Python 会把 django.contrib.staticfiles 和 polls 当作一个字符串来处理。

示例：

>>> s = ('what', 
...      'a',
...      'wonderful'
...      'world')
>>> s
('what', 'a', 'wonderfulworld')

>>> s = ('what',
...      'a',
...      'wonderful',
...      'world')
>>> s
('what', 'a', 'wonderful', 'world')