在uWSGI中使用Django时，内置Python函数出现NameError

Question

我在Ubuntu 10.10（64位）上运行Django 1.3和Python 2.6，并使用uWSGI（0.9.8）。不过，有时候我会在uwsgi.log里看到一些奇怪的日志，报告说'getattr'和'isinstance'没有定义。但它们不是Python的内置函数吗？为什么Django找不到它们呢？这种情况不常发生，通常是在流量较低或者uWSGI服务器重启的时候，而在流量大的时候，服务器运行一段时间后就会经常出现。

我确定我的Django应用没有问题，但我不确定这是Django、uWSGI还是Python 2.6的bug。

更新：最新版本的uWSGI似乎没有再出现这个问题。

详细日志：

Error in sys.excepthook:
 Traceback (most recent call last):
   File "/usr/lib/python2.6/dist-packages/apport_python_hook.py", line 48,  in apport_excepthook
     if not enabled():
   File "/usr/lib/python2.6/dist-packages/apport_python_hook.py", line 24,  in enabled
     return re.search('^\s*enabled\s*=\s*0\s*$', conf, re.M) is None
   File "/usr/lib/python2.6/re.py", line 142, in search
     return _compile(pattern, flags).search(string)
   File "/usr/lib/python2.6/re.py", line 236, in _compile
     if isinstance(pattern, _pattern_type):
 NameError: global name 'isinstance' is not defined

 Original exception was:
 Traceback (most recent call last):
   File "/usr/local/lib/python2.6/dist-
 packages/django/core/handlers/wsgi.py", line 258, in __call__
     set_script_prefix(base.get_script_name(environ))
   File "/usr/local/lib/python2.6/dist-
 packages/django/core/handlers/base.py", line 239, in get_script_name
     if settings.FORCE_SCRIPT_NAME is not None:
   File "/usr/local/lib/python2.6/dist-
 packages/django/utils/functional.py", line 277, in __getattr__
     return getattr(self._wrapped, name)
 NameError: global name 'getattr' is not defined  Traceback (most recent call last):
   File "/usr/local/lib/python2.6/dist-
 packages/django/core/handlers/wsgi.py", line 258, in __call__
     set_script_prefix(base.get_script_name(environ))
   File "/usr/local/lib/python2.6/dist-
 packages/django/core/handlers/base.py", line 252, in get_script_name
     return force_unicode(environ.get('SCRIPT_NAME', u''))
   File "/usr/local/lib/python2.6/dist-packages/django/utils/encoding.py",
 line 64, in force_unicode
     if isinstance(s, unicode):
 NameError: global name 'isinstance' is not defined  Error in sys.excepthook:
 Traceback (most recent call last):
   File "/usr/lib/python2.6/dist-packages/apport_python_hook.py", line 48,  in apport_excepthook
     if not enabled():
   File "/usr/lib/python2.6/dist-packages/apport_python_hook.py", line 24,  in enabled
     return re.search('^\s*enabled\s*=\s*0\s*$', conf, re.M) is None
   File "/usr/lib/python2.6/re.py", line 142, in search
     return _compile(pattern, flags).search(string)
   File "/usr/lib/python2.6/re.py", line 236, in _compile
     if isinstance(pattern, _pattern_type):
 NameError: global name 'isinstance' is not defined

django ubuntu getattr uwsgi nameerror bug isinstance server_restart

在uWSGI中使用Django时，内置Python函数出现NameError

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