Django：python manage.py runserver提供了RuntimeError：在cmp中超过了最大递归深度

Question

我正在尝试从Django项目网站上的第1篇教程学习Django。我可能会缺少一些明显的东西，但是在遵循所有说明后，当我运行命令时

python manage.py runserver

我在请求的结尾处得到了错误消息，以寻求帮助（为简便起见，我仅将错误消息的重复行的前几行发布）。

这是我在网上找到的一些解决方案/建议，但对我没有帮助。

1）sys.setrecursionlimit（1500）。

这对我不起作用。

2）。DjangoRuntimeError：超过最大递归深度

这也不是一个选择，因为我没有使用PyDeV，我尝试使用pip卸载和安装Django，但它没有解决任何问题，并且我使用的是MountainLion的本机python，因为我们不建议将其卸载。

3）。我也尝试过：

 python manage.py runserver --settings=mysite.settings

与没有选项设置的命令完全相同的错误

任何建议，建议将不胜感激。我正在使用…。Django正式版。我使用pip和Python 2.7.2安装的1.5.1

Unhandled exception in thread started by <bound method Command.inner_run of <django.contrib.staticfiles.management.commands.runserver.Command object at 0x10f7ee5d0>>
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/django/core/management/commands/runserver.py", line 92, in inner_run
    self.validate(display_num_errors=True)
  File "/Library/Python/2.7/site-packages/django/core/management/base.py", line 280, in validate
    num_errors = get_validation_errors(s, app)
  File "/Library/Python/2.7/site-packages/django/core/management/validation.py", line 35, in get_validation_errors
    for (app_name, error) in get_app_errors().items():
  File "/Library/Python/2.7/site-packages/django/db/models/loading.py", line 166, in get_app_errors
    self._populate()
  File "/Library/Python/2.7/site-packages/django/db/models/loading.py", line 72, in _populate
    self.load_app(app_name, True)
  File "/Library/Python/2.7/site-packages/django/db/models/loading.py", line 96, in load_app
    models = import_module('.models', app_name)
  File "/Library/Python/2.7/site-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/Library/Python/2.7/site-packages/django/contrib/auth/models.py", line 370, in <module>
    class AbstractUser(AbstractBaseUser, PermissionsMixin):
  File "/Library/Python/2.7/site-packages/django/db/models/base.py", line 213, in __new__
    new_class.add_to_class(field.name, copy.deepcopy(field))
  File "/Library/Python/2.7/site-packages/django/db/models/base.py", line 265, in add_to_class
    value.contribute_to_class(cls, name)
  File "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py", line 257, in contribute_to_class
    cls._meta.add_field(self)
  File "/Library/Python/2.7/site-packages/django/db/models/options.py", line 179, in add_field
    self.local_fields.insert(bisect(self.local_fields, field), field)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
    '__lt__': [('__gt__', lambda self, other: other < self),
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
    '__lt__': [('__gt__', lambda self, other: other < self),
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
    '__lt__': [('__gt__', lambda self, other: other < self),
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
    '__lt__': [('__gt__', lambda self, other: other < self),
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
    '__lt__': [('__gt__', lambda self, other: other < self),
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
    '__lt__': [('__gt__', lambda self, other: other < self),
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
    '__lt__': [('__gt__', lambda self, other: other < self),
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
    '__lt__': [('__gt__', lambda self, other: other < self),

  RuntimeError: maximum recursion depth exceeded in cmp

更新：所以我最终要做的是对安装virtualbox，在其上安装免费的ubuntu，然后继续完成本教程进行大肆宣传…哦！

Answer 1

问题出在 functools.py 文件中。该文件来自Python。我刚刚安装了新版本的python 2.7.5，并且此文件是错误的（我还有另一个-
python 2.7.5的旧安装，并且那里的functools.py文件是正确的）

要解决此问题，请替换它（关于python \ Lib \ fuctools.py中的第56行）：

convert = {
    '__lt__': [('__gt__', lambda self, other: other < self),
               ('__le__', lambda self, other: not other < self),
               ('__ge__', lambda self, other: not self < other)],
    '__le__': [('__ge__', lambda self, other: other <= self),
               ('__lt__', lambda self, other: not other <= self),
               ('__gt__', lambda self, other: not self <= other)],
    '__gt__': [('__lt__', lambda self, other: other > self),
               ('__ge__', lambda self, other: not other > self),
               ('__le__', lambda self, other: not self > other)],
    '__ge__': [('__le__', lambda self, other: other >= self),
               ('__gt__', lambda self, other: not other >= self),
               ('__lt__', lambda self, other: not self >= other)]
}

对此：

convert = {
    '__lt__': [('__gt__', lambda self, other: not (self < other or self == other)),
               ('__le__', lambda self, other: self < other or self == other),
               ('__ge__', lambda self, other: not self < other)],
    '__le__': [('__ge__', lambda self, other: not self <= other or self == other),
               ('__lt__', lambda self, other: self <= other and not self == other),
               ('__gt__', lambda self, other: not self <= other)],
    '__gt__': [('__lt__', lambda self, other: not (self > other or self == other)),
               ('__ge__', lambda self, other: self > other or self == other),
               ('__le__', lambda self, other: not self > other)],
    '__ge__': [('__le__', lambda self, other: (not self >= other) or self == other),
               ('__gt__', lambda self, other: self >= other and not self == other),
               ('__lt__', lambda self, other: not self >= other)]
}

另请阅读：http : //regebro.wordpress.com/2010/12/13/python-
implementing-rich-comparison-the-correct-
way/