diff options
Diffstat (limited to 'six.py')
| -rw-r--r-- | six.py | 23 |
1 files changed, 14 insertions, 9 deletions
@@ -105,17 +105,22 @@ class MovedModule(_LazyDescr): return _import_module(self.mod) def __getattr__(self, attr): - # Hack around the Django autoreloader. The reloader tries to get - # __file__ or __name__ of every module in sys.modules. This doesn't work - # well if this MovedModule is for an module that is unavailable on this - # machine (like winreg on Unix systems). Thus, we pretend __file__ and - # __name__ don't exist if the module hasn't been loaded yet. We give - # __path__ the same treatment for Google AppEngine. See issues #51, #53 - # and #56. + # It turns out many Python frameworks like to traverse sys.modules and + # try to load various attributes. This causes problems if this is a + # platform-specific module on the wrong platform, like _winreg on + # Unixes. Therefore, we silently pretend unimportable modules do not + # have any attributes. See issues #51, #53, #56, and #63 for the full + # tales of woe. + # + # First, if possible, avoid loading the module just to look at __file__, + # __name__, or __path__. if (attr in ("__file__", "__name__", "__path__") and self.mod not in sys.modules): - raise AttributeError - _module = self._resolve() + raise AttributeError(attr) + try: + _module = self._resolve() + except ImportError: + raise AttributeError(attr) value = getattr(_module, attr) setattr(self, attr, value) return value |