python - django-scarface 无法在 python 2.7 中工作

Question

我的操作系统是 OSX El Capitan。

版本:

• Python 2.7.10
• Django 1.9.2
• Django -疤面煞星 3.0

在我安装疤面并将其添加到已安装的应用程序中后，它出现此错误，并且我无法运行我的应用程序。

Unhandled exception in thread started by <function wrapper at 0x1043dbe60>
Traceback (most recent call last):
  File "/Users/mcagataybarin/molocate-dev/env/lib/python2.7/site-packages/django/utils/autoreload.py", line 226, in wrapper
    fn(*args, **kwargs)
  File "/Users/mcagataybarin/molocate-dev/env/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 109, in inner_run
    autoreload.raise_last_exception()
  File "/Users/mcagataybarin/molocate-dev/env/lib/python2.7/site-packages/django/utils/autoreload.py", line 249, in raise_last_exception
    six.reraise(*_exception)
  File "/Users/mcagataybarin/molocate-dev/env/lib/python2.7/site-packages/django/utils/autoreload.py", line 226, in wrapper
    fn(*args, **kwargs)
  File "/Users/mcagataybarin/molocate-dev/env/lib/python2.7/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/Users/mcagataybarin/molocate-dev/env/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "/Users/mcagataybarin/molocate-dev/env/lib/python2.7/site-packages/django/apps/config.py", line 202, in import_models
    self.models_module = import_module(models_module_name)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/Users/mcagataybarin/molocate-dev/env/lib/python2.7/site-packages/scarface/models.py", line 7, in <module>
    from scarface.platform_strategy import get_strategies
  File "/Users/mcagataybarin/molocate-dev/env/lib/python2.7/site-packages/scarface/platform_strategy.py", line 38
    class PlatformStrategy(metaclass=ABCMeta):
                                    ^
SyntaxError: invalid syntax

在我搜索这个错误之后，我认为原因是我的python版本。我还是不确定，所以才来问你。

有什么办法可以解决这个问题吗？如果原因确实是我的 Python 版本，我怎样才能更新我的 Python 版本而不损坏我的代码和所有内容？

Answer 1

该问题与 Python 3.x ( https://docs.python.org/3/whatsnew/3.0.html?highlight=metaclass#changed-syntax ) 中的元类语法更改有关，django-scarface 是面向 3.x 的。我解决了这个问题(使用Python 2.7.x)，将platform_strategy.py(第38行)更改为:

class PlatformStrategy():
    __metaclass__ = ABCMeta

我在github项目中提交了一个pull request:https://github.com/dreipol/django-scarface/pull/11