Question

我是Django升级的新手，我尝试将版本从1.6.5升级到1.8.4。我使用sudo python setup.py install手动安装了1.8.4。当我启动pycharm时，我得到以下错误。我检查__init__.py以检查错误，并尝试找出1.8.4的示例文件以供参考。有人可以解释一下 - 如何逐步解决这些错误。

Failed to get real commands on module "albatross": python process died with code 1: Traceback (most recent call last):
  File "/home/ritesh/Development/pycharm-4.5.3/helpers/pycharm/_jb_manage_tasks_provider.py", line 20, in <module>
    django.setup()
  File "/usr/local/lib/python2.7/dist-packages/Django-1.8.4-py2.7.egg/django/__init__.py", line 17, in setup
    configure_logging(settings.LOGGING_CONFIG, settings.LOGGING)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.8.4-py2.7.egg/django/conf/__init__.py", line 48, in __getattr__
    self._setup(name)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.8.4-py2.7.egg/django/conf/__init__.py", line 44, in _setup
    self._wrapped = Settings(settings_module)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.8.4-py2.7.egg/django/conf/__init__.py", line 108, in __init__
    "Please fix your settings." % setting)
django.core.exceptions.ImproperlyConfigured: The TEMPLATE_DIRS setting must be a tuple. Please fix your settings.

template_dir模板：

import os
CURRENT_PATH = os.path.dirname(os.path.dirname(__file__))
TEMPLATE_DIRS = (
 CURRENT_PATH + '/templates'
)

Answer 1

这样：

TEMPLATE_DIRS = (
     CURRENT_PATH + '/templates'
)

不一个tuple，它只是CURRENT_PATH + 'templates'字符串。什么使tuple不是parens而是逗号，即：

>>> t = ("aaa")
>>> t
'aaa'
>>> type(t)
<type 'str'>
>>> t = "aaa", "bb"
>>> t
('aaa', 'bb')
>>> type(t)
<type 'tuple'>
>>> t = "aaa",
>>> t
('aaa',)
>>> type(t)
<type 'tuple'>
>>>

唯一的例外是空tuple的litteral表达式（我假设出于可读性原因？）拼写为()而不是,

除了这种特殊情况，tuple附近的parens在技术上是无用的，仅用于可读性。

将Django从1.6.5升级到1.8.4时的问题

1 个答案: