t.p.f.UnlistableError(OSError) : class documentation

Known subclasses: twisted.python.filepath._WindowsUnlistableError

An exception which is used to distinguish between errors which mean 'this is not a directory you can list' and other, more catastrophic errors.

This error will try to look as much like the original error as possible, while still being catchable as an independent type.

Instance Variable	originalException	the actual original exception instance, either an OSError or a WindowsError.
Method	__init__	Create an UnlistableError exception.