导入错误：无法导入名称force_text

我已在 CentOS 计算机中安装了 Python 2.7 和 Django 1.4，并安装了现有项目的所有依赖项。当我跑步时python manage.py runserver，我在控制台中收到以下回溯

[root@localhost bv]# python manage.py runserver
Validating models...

Unhandled exception in thread started by <bound method Command.inner_run of <django.contrib.staticfiles.management.commands.runserver.Command object at 0x8ddd7ec>>
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 91, in inner_run
    self.validate(display_num_errors=True)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 266, in validate
    num_errors = get_validation_errors(s, app)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/validation.py", line 30, in get_validation_errors
    for (app_name, error) in get_app_errors().items():
  File "/usr/local/lib/python2.7/site-packages/django/db/models/loading.py", line 158, in get_app_errors
    self._populate()
  File "/usr/local/lib/python2.7/site-packages/django/db/models/loading.py", line 67, in _populate
    self.load_app(app_name)
  File "/usr/local/lib/python2.7/site-packages/django/db/models/loading.py", line 88, in load_app
    models = import_module('.models', app_name)
  File "/usr/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/usr/local/lib/python2.7/site-packages/debug_toolbar/models.py", line 6, in <module>
    from debug_toolbar.toolbar.loader import load_panel_classes
  File "/usr/local/lib/python2.7/site-packages/debug_toolbar/toolbar/loader.py", line 12, in <module>
    from debug_toolbar.utils.settings import CONFIG
  File "/usr/local/lib/python2.7/site-packages/debug_toolbar/utils/__init__.py", line 9, in <module>
    from django.utils.encoding import force_text
ImportError: cannot import name force_text

升级到最新的 Django 1.4（截至 2014 年 7 月 8 日 -“1.4.13”）。

我看到他们添加了一个快捷方式（force_text） 在里面django.utils.encoding模块：https://github.com/django/django/blob/stable/1.4.x/django/utils/encoding.py https://github.com/django/django/blob/stable/1.4.x/django/utils/encoding.py

请注意，该快捷方式在最初的 1.4 版本中不存在（https://github.com/django/django/blob/1.4/django/utils/encoding.py https://github.com/django/django/blob/1.4/django/utils/encoding.py）并且仅在 1.4.2 中添加（https://github.com/django/django/blob/1.4.2/django/utils/encoding.py https://github.com/django/django/blob/1.4.2/django/utils/encoding.py).

正如文档中所述django-debug-toolbar，当前版本（截至 2014 年 7 月 8 日 - “1.2.1”）在 Django 1.4 到 1.7 上运行良好。

因此，请确保您使用最新版本的Django1.4.x 和django-debug-toolbar.